Dell Precision Tower 3420 Owner's Manual
Working on your computer
Removing and installing components
System Setup
Diagnostics
- Enhanced Pre-Boot System Assessment (ePSA) diagnostics
- Troubleshooting your computer
Specifications
Contacting Dell

DELL T3420 User Manual

Displayed below is the user manual for T3420 by DELL which is a product in the PCs/Workstations category. This manual has pages.

Related Manuals

DELL T3420 Manual

Dell Precision Tower 3420

Owner's Manual

Regulatory Model: D11S

Regulatory Type: D11S001

Notes, cautions, and warnings

NOTE: A NOTE indicates important information that helps you make better use of your computer.

CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the

problem.

WARNING: A WARNING indicates a potential for property damage, personal injury, or death.

and the Dell logo are trademarks of Dell Inc. in the United States and/or other jurisdictions. All other marks and names mentioned herein may be

trademarks of their respective companies.

2016 - 06

Rev. A02

Contents

1 Working on your computer...............................................................................................5

Safety instructions..............................................................................................................................................................5

Before working inside your computer................................................................................................................................. 5

Turning o your computer.................................................................................................................................................. 6

After working inside your computer....................................................................................................................................6

2 Removing and installing components...............................................................................7

Recommended tools........................................................................................................................................................... 7

Removing the cover............................................................................................................................................................7

Installing the cover..............................................................................................................................................................7

Removing the front bezel................................................................................................................................................... 8

Installing the front bezel......................................................................................................................................................8

Removing the hard drive assembly..................................................................................................................................... 8

Installing the hard drive assembly....................................................................................................................................... 9

Removing the optical drive................................................................................................................................................. 9

Installing the optical drive...................................................................................................................................................11

Removing the intrusion switch...........................................................................................................................................11

Installing the intrusion switch............................................................................................................................................ 12

Removing the memory module..........................................................................................................................................12

Installing the memory module............................................................................................................................................12

Installing the optional PCIe SSD card................................................................................................................................ 13

Removing the optional PCIe SSD card.............................................................................................................................. 14

Removing the expansion card........................................................................................................................................... 14

Installing the expansion card............................................................................................................................................. 15

Removing the power supply unit (PSU)............................................................................................................................ 15

Installing the power supply unit (PSU).............................................................................................................................. 16

Removing the power button............................................................................................................................................. 16

Installing the power button................................................................................................................................................17

Removing the Input/Output (I/O) panel........................................................................................................................... 17

Installing the Input/Output (I/O) panel............................................................................................................................. 18

Removing the system fan..................................................................................................................................................18

Installing the system fan....................................................................................................................................................18

Removing the heat sink fan cover.....................................................................................................................................19

Installing the heat sink fan cover....................................................................................................................................... 19

Removing the heat sink assembly..................................................................................................................................... 19

Installing the heat sink assembly.......................................................................................................................................20

Removing the processor...................................................................................................................................................20

Installing the processor..................................................................................................................................................... 21

Removing the system board..............................................................................................................................................21

Installing the system board............................................................................................................................................... 22

System board components...............................................................................................................................................23

3 System Setup................................................................................................................25

Boot Sequence.................................................................................................................................................................25

Navigation keys................................................................................................................................................................ 25

System Setup options...................................................................................................................................................... 26

Updating the BIOS .......................................................................................................................................................... 33

Jumper settings................................................................................................................................................................33

System and setup password.............................................................................................................................................33

Assigning a system password and setup password.....................................................................................................34

Deleting or changing an existing system and/or setup password................................................................................34

Disabling a system password...................................................................................................................................... 35

4 Diagnostics................................................................................................................... 36

Enhanced Pre-Boot System Assessment (ePSA) diagnostics.......................................................................................... 36

Troubleshooting your computer........................................................................................................................................36

Power LED diagnostics...............................................................................................................................................36

Beep code.................................................................................................................................................................. 37

Error messages...........................................................................................................................................................37

5 Specications................................................................................................................ 41

6 Contacting Dell............................................................................................................. 46

Working on your computer

Safety instructions

Use the following safety guidelines to help protect your computer from potential damage and to help to ensure your personal safety.

Unless otherwise noted, each procedure included in this document assumes that the following conditions exist:

• You have read the safety information that shipped with your computer.

• A component can be replaced or--if purchased separately--installed by performing the removal procedure in reverse order.

WARNING: Disconnect all power sources before opening the computer cover or panels. After you nish working inside

the computer, replace all covers, panels, and screws before connecting to the power source.

WARNING: Before working inside your computer, read the safety information that shipped with your computer. For

additional safety best practices information, see the Regulatory Compliance Homepage at www.dell.com/

regulatory_compliance

CAUTION: Many repairs may only be done by a certied service technician. You should only perform troubleshooting and

simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support

team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety

instructions that came with the product.

CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching

an unpainted metal surface, such as a connector on the back of the computer.

CAUTION: Handle components and cards with care. Do not touch the components or contacts on a card. Hold a card by

its edges or by its metal mounting bracket. Hold a component such as a processor by its edges, not by its pins.

CAUTION: When you disconnect a cable, pull on its connector or on its pull-tab, not on the cable itself. Some cables have

connectors with locking tabs; if you are disconnecting this type of cable, press in on the locking tabs before you

disconnect the cable. As you pull connectors apart, keep them evenly aligned to avoid bending any connector pins. Also,

before you connect a cable, ensure that both connectors are correctly oriented and aligned.

NOTE: The color of your computer and certain components may appear dierently than shown in this document.

Before working inside your computer

To avoid damaging your computer, perform the following steps before you begin working inside the computer.

1. Ensure that you follow the Safety instructions.

2. Ensure that your work surface is at and clean to prevent the computer cover from being scratched.

3. Turn o your computer, see Turning o your computer.

CAUTION: To disconnect a network cable, rst unplug the cable from your computer and then unplug the cable from

the network device.

4. Disconnect all the network cables from the computer.

5. Disconnect your computer and all attached devices from the electrical outlets.

6. Press and hold the power button while the computer is unplugged to ground the system board.

7. Remove the cover.

CAUTION: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface,

such as the metal at the back of the computer. While you work, periodically touch an unpainted metal surface to

dissipate static electricity, which could harm internal components.

Turning o your computer

CAUTION: To avoid losing data, save and close all open les and exit all open programs before you turn o your

computer.

1. Turning o your computer:

• In Windows 10 (using a touch enabled device or mouse):

1. Click or tap .

2. Click or tap and then click or touch Shut down.

• In Windows 8 (using a touch enabled device):

1. Swipe in from the right edge of the screen, opening the Charms menu and select Settings.

2. Tap and then tap Shut down

• In Windows 8 (using a mouse):

1. Point to upper-right corner of the screen and click Settings.

2. Click and then click Shut down.

• In Windows 7:

1. Click Start.

2. Click Shut Down.

1. Click Start.

2. Click the arrow in the lower-right corner of the Start menu and then click Log o.

2. Ensure that the computer and all attached devices are turned o. If your computer and attached devices did not automatically

turn o when you shut down your operating system, press and hold the power button for about 6 seconds to turn them o.

After working inside your computer

After you complete any replacement procedure, ensure that you connect any external devices, cards, and cables before turning on

your computer.

1. Replace the cover.

CAUTION: To connect a network cable, rst plug the cable into the network device and then plug it into the

computer.

2. Connect any telephone or network cables to your computer.

3. Connect your computer and all attached devices to their electrical outlets.

4. Turn on your computer.

5. If required, verify that the computer works correctly by running Dell Diagnostics.

Removing and installing components

This section provides detailed information on how to remove or install the components from your computer.

Recommended tools

The procedures in this document require the following tools:

• Small at blade screwdriver

• Phillips screwdriver

• Small plastic scribe

Removing the cover

1. Follow the procedure in Before Working Inside Your Computer.

2. To remove the cover:

a. Slide the release latch to unlock the cover [1].

b. Slide the cover toward the back of the computer [2].

c. Lift the cover from the computer [3].

Installing the cover

1. Align the cover with the tabs on the chassis .

2. Slide the cover until it clicks into place.

3. Follow the procedure in After Working Inside Your Computer.

Removing the front bezel

1. Follow the procedure in Before Working Inside Your Computer.

2. Remove the cover.

3. To remove the front bezel:

a. Lift the retention tabs and release the front bezel [1].

b. Lift the front bezel to remove it from the computer [2].

Installing the front bezel

1. Insert the tabs on the bezel into the slots on the computer.

2. Press the bezel until the tabs clicks into place.

3. Install the cover.

4. Follow the procedure in After Working Inside Your Computer.

Removing the hard drive assembly

1. Follow the procedure in Before Working Inside Your Computer.

2. Remove the cover.

3. To release the hard drive assembly:

a. Disconnect the data cables from the hard drives [1].

b. Lift the hard drive assembly away from the computer [2].

4. To remove the hard drive bracket:

a. Pull one side of the hard drive bracket to disengage the pins on the bracket from the slots on the hard drive [1].

b. Lift the hard drive out of the hard drive bracket [2].

5. Repeat steps 3 to remove the additional hard drive (if available).

Installing the hard drive assembly

1. Insert the hard drive into the hard drive bracket.

2. Press the securing brackets and slide the hard drive assembly into the bay.

3. Connect the data cable and the power cable to the hard drive.

4. Install the cover.

5. Follow the procedure in After Working Inside Your Computer.

Removing the optical drive

1. Follow the procedure in Before Working Inside Your Computer.

2. Remove the:

a. cover

b. front bezel

3. To release the optical drive :

a. Remove the hard drive connector cables from the optical drive latch [1].

b. Slide the blue latch to the unlock position [2].

4. To remove the optical drive:

a. Hold the blue latch [1], lift the optical drive cage and disconnect the cables from the optical drive [2].

b. Lift the optical drive cage away from the computer [3].

5. To remove the optical drive from the optical drive cage:

a. Press the optical drive release latch [1] and slide the optical drive forward [2].

b. Remove the optical drive from the optical drive cage [3].

Installing the optical drive

1. Slide the optical drive into the optical drive cage.

2. Align the tabs on the optical cage with the slots on the computer.

3. Lower the optical drive cage into the computer and lock the latch.

4. Connect the data and power cables to the optical drive.

5. Install the:

a. front bezel

b. cover

6. Follow the procedure in After Working Inside Your Computer.

Removing the intrusion switch

1. Follow the procedure in Before Working Inside Your Computer.

2. Remove the:

a. cover

b. heat sink fan cover

3. To remove the intrusion switch:

a. Disconnect the intrusion switch cable from the connector on the system board [1, 2].

b. Slide the intrusion switch and lift it away from the computer [3].

Installing the intrusion switch

1. Insert the intrusion switch into the slot on the chassis.

2. Connect the intrusion switch cable to the system board.

3. Install the:

a. heat sink fan cover

b. cover

4. Follow the procedure in After Working Inside Your Computer.

Removing the memory module

1. Follow the procedure in Before Working Inside Your Computer.

2. Remove the:

a. cover

b. hard drive

c. optical drive

3. To remove the memory module:

a. Press the memory module retention tabs on both sides of the memory module.

b. Lift the memory module from the memory module connector on the system board.

Installing the memory module

1. Align the notch on the memory module with the tab on the memory module connector.

2. Insert the memory module into the memory module socket.

3. Press the memory module until the memory module retention tabs click into place.

4. Install the:

a. optical drive

b. hard drive

c. cover

5. Follow the procedure in After Working Inside Your Computer.

Installing the optional PCIe SSD card

NOTE: The PCIe SSD card is shipped with the following components:

1. PCIe SSD card

2. Thermal pad

3. Screw

1. Follow the procedure in Before Working Inside Your Computer

2. Remove the:

a. cover

b. hard drive

c. optical drive

3. Peel the adhesive tape (blue) from the rubber.

4. Place the rubber on the computer [1] and peel the adhesive tape (pink) from the rubber [2].

5. To install the SSD card:

a. Connect the SSD card to the connector on the system board [1].

b. Tighten the screw to secure the SSD card to the system board [2].

Removing the optional PCIe SSD card

1. Follow the procedure in After Working Inside Your Computer.

2. Install the:

a. cover

b. hard drive

c. optical drive

3. Remove the screw that secures the PCIe SSD card to the system board.

4. Disconnect the PCIe SSD card from the connector on the system board.

5. Remove the rubber from the system board.

Removing the expansion card

1. Follow the procedure in Before Working Inside Your Computer.

2. Remove the cover.

3. To remove the expansion card:

a. Pull the metal tab to open the expansion card latch [1].

b. Pull the tab forward [2] and pull the expansion card from the connector on the computer [3].

Installing the expansion card

1. Insert the expansion card into the connector on the system board.

2. Press the expansion card until it clicks into place.

3. Close the expansion card latch and press it until it clicks into place.

4. Install the cover.

5. Follow the procedure in After Working Inside Your Computer.

Removing the power supply unit (PSU)

1. Follow the procedure in Before Working Inside Your Computer.

2. Remove:

a. cover

b. front bezel

c. hard drive

d. optical drive

e. heatsink fan cover

3. To release the PSU:

a. Disconnect the power cable from the system board [1, 2].

b. Unroute the power cables from the retention clips on the chassis [3}.

4. To remove the PSU:

a. Remove the screws at the back of the computer that secure the PSU to the computer [1].

b. Press the blue release tab [2] and lift the PSU away from the computer [3].

Installing the power supply unit (PSU)

1. Slide the PSU toward the back of the computer until it clicks into place.

2. Tighten the screws to secure the PSU to the computer.

3. Route the PSU cables through the retention clips.

4. Connect the PSU cables to their connectors on the system board.

5. Install the:

a. heat sink fan cover

b. optical drive

c. hard drive

d. front bezel

e. cover

6. Follow the procedure in After Working Inside Your Computer.

Removing the power button

1. Follow the procedure in Before Working Inside Your Computer.

2. Remove the:

a. cover

b. front bezel

c. hard drive

d. optical drive

3. To remove the power button:

a. Disconnect the power switch cable from the system board [1].

b. Press the power switch retention tabs and remove it from the chassis [2, 3].

Installing the power button

1. Slide the power switch module into the slot on the chassis until it clicks into place.

2. Connect the power switch cable to the connector on the system board.

3. Install the:

a. optical drive

b. hard drive

c. front bezel

d. cover

4. Follow the procedure in After Working Inside Your Computer.

Removing the Input/Output (I/O) panel

1. Follow the procedure in Before Working Inside Your Computer.

2. Remove the:

a. cover

b. front bezel

3. To remove the I/O panel:

a. Remove the screw that secures the I/O panel to the chassis [1].

b. Slide the I/O panel to the right and remove it from the computer [2].

Installing the Input/Output (I/O) panel

1. Insert the I/O panel on the chassis and slide it until it clicks into place.

2. Tighten the screws to secure the I/O panel to the chassis.

3. Install the:

a. front bezel

b. cover

4. Follow the procedure in After Working Inside Your Computer.

Removing the system fan

1. Follow the procedure in Before Working Inside Your Computer.

2. Remove the:

a. cover

b. front bezel

c. hard drive

d. optical drive

3. To remove the system fan:

a. Disconnect the system fan cable from the system board [1].

b. Slide the fan grommets toward the slot on the back wall [2].

c. Lift the fan away from the computer [3].

Installing the system fan

1. Place the system fan in the computer.

2. Pass the grommets through the chassis and slide outward along the groove to secure it in place.

3. Connect the system fan cable to the system board.

4. Install the:

a. optical drive

b. hard drive

c. front bezel

d. cover

5. Follow the procedure in After Working Inside Your Computer.

Removing the heat sink fan cover

1. Follow the procedure in Before Working Inside Your Computer.

2. Remove the cover.

3. To remove the fan duct:

a. Holding the touch points, pull the fan duct bracket to release the fan duct [1].

b. Lift the fan duct away from the computer [2].

Installing the heat sink fan cover

1. Align the slots on the fan duct, with the screws on the heat sink.

2. Insert the fan duct until it clicks into place.

3. Install the cover.

4. Follow the procedure in After Working Inside Your Computer.

Removing the heat sink assembly

1. Follow the procedure in Before Working Inside Your Computer.

2. Remove the:

a. cover

b. front bezel

c. hard drive

d. optical drive

e. heat sink fan cover

3. To remove the heat sink assembly:

a. Disconnect the heat sink cable from the system board [1].

b. Loosen the captive screws that secure the heat sink assembly and lift it away from the computer [2, 3].

Installing the heat sink assembly

1. Place the heat sink assembly onto the processor.

2. Tighten the captive screws to secure the heat sink assembly to the system board.

3. Connect the heat sink cable to the system board.

4. Install the:

a. heat sink fan cover

b. optical drive

c. hard drive

d. front bezel

e. cover

5. Follow the procedure in After Working Inside Your Computer.

Removing the processor

1. Follow the procedure in Before Working Inside Your Computer.

2. Remove the:

a. cover

b. front bezel

c. hard drive

d. heat sink

3. To remove the processor:

a. Release the socket lever by pushing the lever down and out from under the tab on the processor shield [1].

b. Lift the lever upward and lift the processor shield [2].

c. Lift the processor out of the socket [3].

Installing the processor

1. Align the processor with the socket keys.

2. Align the pin-1 indicator of the processor with the triangle on the socket.

3. Place the processor on the socket such that the slots on the processor align with the socket keys.

4. Close the processor shield by sliding it under the retention screw.

5. Lower the socket lever and push it under the tab to lock it.

6. Install the:

a. heat sink

b. hard drive

c. front bezel

d. cover

7. Follow the procedure in After Working Inside Your Computer.

Removing the system board

1. Follow the procedure in Before Working Inside Your Computer.

2. Remove the:

a. cover

b. front bezel

c. hard drive

d. optical drive

e. heat sink fan cover

f. heat sink

g. system fan

h. memory module

i. PCIe SSD

3. Disconnect the cables from the system board.

4. To remove the system board:

a. Remove the screws that secure the system board to the computer [1].

b. Slide the system board toward the front of the computer and lift it from the computer [2].

Installing the system board

1. Hold the system board by its edges and angle it toward the back of the computer.

2. Lower the system board into the computer until the connectors at the back of the system board align with the slots on the back

wall of the computer, and the screw holes on the system board align with the standos on the computer.

3. Tighten the screws that secure the system board to the computer

4. Connect the cables to the system board.

5. Install the:

a. PCIe SSD

b. memory moudle

c. system fan

d. heat sink

e. heat sink fan cover

f. optical drive

g. hard drive

h. front bezel

i. cover

6. Follow the procedure in After Working Inside Your Computer.

System board components

Figure 1. Components of the system board

1. PCI Express x16 Gen 3 slot 2. PCI Express x4 slot

3. USB 2.0 with network connector 4. USB 3.0 connector

5. PS2 keyboard/mouse connectors 6. serial port connector

7. 2 x DisplayPort connector 8. HDMI connector

9. Line-Out connector 10. P2 power connector

11. intrusion switch connector 12. VGA connector

13. CPU socket 14. CPU fan connector

15. memory slot 16. SATA or PCIe SSD Slot

17. front power-switch connector 18. debug connector

19. SD Card Reader (optional) 20. front panel power LED indicator

21. system fan connector 22. audio connector

23. USB 2.0 connector 24. USB 3.0 connector

25. 8-pin power connector 26. SATA 0 connector (Blue color)

27. SATA 2 connector(Black color) 28. password reset jumper

29. service mode jumper connector 30. speaker connector

31. SATA power connector 32. CLINK header for Intel WiFi add-in-card

33. SATA 1 connector (White color) 34. CMOS coin cell battery

35. Debug connector 36. Thunderbolt connector

System Setup

System Setup enables you to manage your computer hardware and specify BIOS level options. From the System Setup, you can:

• Change the NVRAM settings after you add or remove hardware

• View the system hardware conguration

• Enable or disable integrated devices

• Set performance and power management thresholds

• Manage your computer security

Boot Sequence

Boot Sequence allows you to bypass the System Setup‐dened boot device order and boot directly to a specic device (for

example: optical drive or hard drive). During the Power-on Self Test (POST), when the Dell logo appears, you can:

• Access System Setup by pressing F2 key

• Bring up the one-time boot menu by pressing F12 key

The one-time boot menu displays the devices that you can boot from including the diagnostic option. The boot-menu options are:

Table 1. Boot Sequence

Option Description

Legacy Boot • ST2000DM001–1ER164

• CD/DVD/CD-RW Drive

• Onboard NIC

UEFI Boot Windows Boot Manager

Other options • BIOS Setup

• BIOS Flash Update

• Diagnostics

• Intel (R) Management Engine BIOS Extension (MEBx)

• Change Boot Mode Settings

The boot sequence screen also displays the option to access the System Setup screen.

Navigation keys

The following table displays the system setup navigation keys.

NOTE: For most of the System Setup options, changes that you make are recorded but do not take eect until you

restart the system.

Table 2. Navigation keys

Keys Navigation

Up arrow Moves to the previous eld.

Down arrow Moves to the next eld.

Enter Allows you to select a value in the selected eld (if applicable) or follow the link in the eld.

Spacebar Expands or collapses a drop‐down list, if applicable.

Tab Moves to the next focus area.

NOTE: For the standard graphics browser only.

Esc Moves to the previous page till you view the main screen. Pressing Esc in the main screen displays a

message that prompts you to save any unsaved changes and restarts the system.

F1 Displays the System Setup help le.

System Setup options

NOTE: Depending on your computer and its installed devices, the items listed in this section may or may not appear.

Table 3. General

Option Description

System Information This section lists the primary hardware features of your computer.

• System Information

• Memory Conguration

• PCI Information

• Processor Information

• Device Information

Boot Sequence Allows you to change the order in which the computer attempts to nd an operating system.

• Diskette Drive

• USB Storage Device

• CD/DVD/CD-RW Drive

• Onboard NIC

• Internal HDD

Boot List Options Allows you to change the boot list option.

• Legacy

• UEFI

Advanced Boot Options Allows you to Enable Legacy Option ROMs

•Enable Legacy Option ROMs (Default: not enabled)

Date/Time Allows you to set the date and time. The changes to the system date and time takes eect

immediately.

Table 4. System conguration

Option Description

Integrated NIC Allows you to congure the integrated network controller. The options are:

• Enable UEFI Network Stack

• Disabled

Option Description

NOTE: You can use the Disabled option, only if Active Management Technology

(AMT) option is disabled.

• Enabled

•Enabled w/PXE (Default)

• Enabled w/Cloud Desktop

Serial Port Identies and denes the serial port settings. You can set the serial port to:

• Disabled

•COM1 (Default)

• COM2

• COM3

• COM4

NOTE: The operating system may allocate resources even if the setting is disabled.

SATA Operation Allows you to congure the internal SATA hard-drive controller. The options are:

• Disabled

• AHCI

•RAID On (Default)

Drives Allows you to congure the SATA drives on board. The options are:

• SATA-0

• SATA-1

• SATA-2

• M.2 PCIe SSD-0

Default Setting: All drives are enabled.

SMART Reporting This eld controls if the hard drive errors for the integrated drives are reported during system

startup. This technology is part of the SMART (Self Monitoring Analysis and Reporting

Technology) specication.

•Enable SMART Reporting - This option is disabled by default.

USB Conguration Allows you to enable or disable the USB conguration. The options are:

• Enable Boot Support

• Enable Front USB Ports

• Enable rear USB Ports

Front USB Conguration Allows you to enable or disable the Front USB conguration. The options are:

• Front Port 1

• Front Port 2

• Front Port 3

• Front Port 4

Rear USB Conguration Allows you to enable or disable the rear USB conguration. The options are:

• Rear Port 1

• Rear Port 2

• Rear Port 3

• Rear Port 4

• Rear Port 5

• Rear Port 6

Thunderbolt Allows you to enable or disable Thunderbolt device support capability. The options are:

Option Description

•Enabled (Default)

• No Security

• User Conguration

• Secure Connect

• Display Port Only

USB PowerShare Allows you to enable or disable USB PowerShare.

Enable USB PowerShare -This option is disabled by default.

Audio Allows you enable or disable the audio feature.

Enable Audio (Default)

• Enable Microphone

• Enable Internal Speaker

Miscellaneous devices Allows you to enable or disable various on board devices.

•Enable Media Card (Default)

• Disable Media Card

Table 5. Video

Option Description

Primary Display Allows you to congure primary video controller when there are multiple controllers available.

The options are:

•Auto (Default)

• Intel HD Graphics

Table 6. Security

Option Description

Strong Password Allows you to enforce the option to always set strong passwords.

Default Setting: Enable Strong Password is not selected.

Password Conguration Allows you to dene the length of the Admin password. Min = 4 , Max = 32

Password Bypass Allows you to enable or disable the permission to bypass the System password, when it is set.

The options are:

•Disabled (Default)

• Reboot bypass

Password Change Allows you to enable the disable permission to the System passwords when the administrator

password is set.

Default Setting: Allow Non-Admin Password Changes is selected

TPM 1.2 Security Allows you to control whether the Trusted Platform Module (TPM) is visible to the operating

system. The options are:

•TPM On (Default)

• PPI Bypass for Enable Commands

• PPI Bypass for Disable Commands

• Disabled

• Enabled

Computrace (R) Allows you to activate or disable the optional Computrace software. The options are:

Option Description

•Deactivate (Default)

• Disable

• Activate

Chassis Intrusion Allows you to enable or disable the chassis intrusion feature. The options are:

•Disabled (Default)

• Enabled

• On-Silent

CPU XD Support Allows you to enable the Execute Disable mode of the processor.

•Enable CPU XD Support (Default)

OROM Keyboard Access Allows you to determine whether users are able to enter Option ROM Conguration screens

via hotkeys during boot. The options are:

•Enable (Default)

• One Time Enable

• Disable

Admin Setup Lockout Allows you to prevent users from entering Setup when an administrator password is set.

• Enable Admin Setup Lockout

Default Setting: The option is disabled.

Table 7. Secure Boot

Option Description

Secure Boot Enable Allows you to enable or disable the Secure Boot Feature. The options are:

• Disabled

•Enabled (Default)

Expert Key Management Allows you to enable or disable Custom Mode Key Management.

• Enable Custom Mode (This option is not enabled by default)

If Enabled, the options are:

• PK

• KEK

• db

• dbx

Table 8. Intel Software Guard Extensions

Option Description

Intel SGX Enable Allows you to enable or disable Intel Software Guard Extensions. The options are:

•Disabled (Default)

• Enabled

Enclave Memory Size Allows you to change the Intel Software Guard Extensions Enclave Reserve Memory size. The

options are:

• 32 MB

• 64 MB

• 128 MB

Table 9. Performance

Option Description

Multi Core Support This eld species whether the processor will have one or all cores enabled. The performance

of some applications will improve with the additional cores. This option is enabled by default.

Allows you to enable or disable multi-core support for the processor. The options are:

•All (Default)

• 1

• 2

• 3

NOTE:

• The options displayed could be dierent depending on the installed processor.

• The options depend on the number of cores supported by the installed processor (All,

1, 2, N-1 for N-Core Processors)

Intel SpeedStep Allows you to enable or disable the Intel SpeedStep feature.

Default Setting: Enable Intel SpeedStep

C-States Control Allows you to enable or disable the additional processor sleep states.

C states (This option is selected by default)

Limit CPUID Value This eld limits the maximum value the processor Standard CPUID Function will support.

•Enable CPUID Limit

Default Setting: The option is disabled.

Table 10. Power management

Option Description

AC Recovery Species how the computer will respond when AC power is applied after a AC power loss. You

can set the AC Recovery to:

•Power O (Default)

• Power On

• Last Power State

Auto On Time Allows you to set the time at which the computer must turn on automatically. The options are:

•Disabled (Default)

• Every Day

• Weekdays

• Select Days

Deep Sleep Control Allows you to dene the controls when Deep Sleep is enabled.

•Disabled (Default)

• Enabled in S5 only

• Enabled in S4 and S5

Fan Control Override Allows you to control the speed of the system fan. The options are:

•Fan Control Override

Default Setting: The option is disabled.

USB Wake Support Allows you to enable USB devices to wake the system from standby.

•Enable USB Wake Support

Option Description

Default Setting: The option is disabled.

Wake on LAN/WLAN This option allows the computer to power up from the o state when triggered by a special

LAN signal. Wake-up from the Standby state is unaected by this setting and must be enabled

in the operating system. This feature only works when the computer is connected to AC

power supply.

•Disabled (Default)

• LAN Only

• WLAN Only

• LAN or WLAN

• LAN with PXE Boot

Block Sleep Allows you to block entering to sleep (S3 state) in OS Environment.

Block Sleep (S3 State)

This option is disabled by default.

Intel Ready Mode This option allows you to enable the capability of Intel Ready Mode Technology.

Enable Intel Ready Mode (this option is disabled by default)

Table 11. POST behavior

Option Description

Numlock LED Allows you to specify if the NumLock function is enabled when the system boots. This option

is enabled by default.

MEBx Hotkey Allows you to specify whether the MEBx Hotkey function should be enabled when the system

boots. This option is enabled by default.

Keyboard Errors Species whether keyboard related errors are reported when it boots. This option is enabled by

default.

Table 12. Virtualization support

Option Description

Virtualization This option species whether a Virtual Machine Monitor (VMM) can utilize the additional

hardware capabilities provided by Intel Virtualization technology.

•Enable Intel Virtualization Technology - This option is enabled by default.

VT for Direct I/O Enables or disables the Virtual Machine Monitor (VMM) from utilizing the additional hardware

capabilities provided by Intel Virtualization technology for direct I/O.

•Enable VT for Direct I/O - This option is enabled by default.

Trusted Execution Allows you to specify whether a Measured Virtual Machine Monitor (MVMM) can utilize the

additional hardware capabilities provided by Intel Trusted Execution Program.

•Trusted Execution - This option is disabled by default.

Table 13. Maintenance

Option Description

Service Tag Displays the service tag of your computer.

Asset Tag Allows you to create a system asset tag if an asset tag is not already set. This option is not set

by default.

SERR Messages Allows you to control the SERR message mechanism. This option is not set by default. Some

graphics cards require that the SERR message mechanism be disabled.

Option Description

BIOS Downgrade Allows you to control the ashing of the system rmware to previous revisions. This option is

enabled by default.

Data Wipe Allows you to securely erase data from all internal storage devices. The option is disabled by

default.

BIOS Recovery Allows you to recover from certain corrupted BIOS conditions using a recovery le. This option

is enabled by default.

Table 14. Cloud desktop

Option Description

Server Lookup Method Allows you to specify how the Cloud Desktop software will lookup server addresses. The

options are:

• Static IP

•DNS (default)

Server Name Allows you to specify the Server Name of the server.

Server IP Address Species the primary static IP address of the Cloud Desktop Server with which the client

software communicates. The default setting is 255.255.255.255

Server Port Allows you to specify the primary IP port of the Cloud Desktop with which the client software

communicates. The default setting is 06910.

Client Address Method Allows you to specify how the client will obtain its IP address. The options are:

• Static IP

•DHCP (default)

Client IP Address Species the Static IP address of the client. The default setting is 255.255.255.255

Client Subnet Mask Species the subnet mask of the client. The default setting is 255.255.255.255

Client Gateway Species the gateway of the client. The default setting is 255.255.255.255

DNS IP Address Species the DNS IP address of the client. The default setting is 255.255.255.255

Domain Name Species the Domain name of the client.

Advanced Allows you to enable Verbose Mode for advanced debugging. By default this option is disabled.

Table 15. System Logs

Option Description

BIOS events Displays the system event log and allows you to clear the log.

• Clear Log

Table 16. Engineering congurations

Option Description

ASPM Allows you to set the Active State Power Management level:

•Auto (Default)

• Disabled

• L1 Only

Updating the BIOS

It is recommended to update your BIOS (System Setup), on replacing the system board or if an update is available. For laptops,

ensure that your computer battery is fully charged and connected to a power outlet

1. Restart the computer.

2. Go to Dell.com/support.

3. Enter the Service Tag or Express Service Code and click Submit.

NOTE: To locate the Service Tag, click Where is my Service Tag?

NOTE: If you cannot nd your Service Tag, click Detect My Product. Proceed with the instructions on screen.

4. If you are unable to locate or nd the Service Tag, click the Product Category of your computer.

5. Choose the Product Type from the list.

6. Select your computer model and the Product Support page of your computer appears.

7. Click Get drivers and click View All Drivers.

The Drivers and Downloads page opens.

8. On the Drivers and Downloads screen, under the Operating System drop-down list, select BIOS.

9. Identify the latest BIOS le and click Download File.

You can also analyze which drivers need an update. To do this for your product, click Analyze System for Updates and follow

the instructions on the screen.

10. Select your preferred download method in the Please select your download method below window, click Download File.

The File Download window appears.

11. Click Save to save the le on your computer.

12. Click Run to install the updated BIOS settings on your computer.

Follow the instructions on the screen.

NOTE: It is recommended not to update the BIOS version for more than 3 revisions. For example: If you want to update

the BIOS from 1.0 to 7.0, then install version 4.0 rst and then install version 7.0.

Jumper settings

To change a jumper setting, pull the plug o its pin(s) and carefully t it down onto the pin(s) indicated on the system board.

Table 17. Jumper settings

Jumper Setting Description

PSWD Default Short: Default

Open: Clear Password

RTCRST Default Open: Default

Short: Real-time clock reset. Can be used for troubleshooting

SERVICE_MODE Default Open: Default

Short: ME disable

System and setup password

You can create a system password and a setup password to secure your computer.

Password type Description

System password Password that you must enter to log on to your system.

Setup password Password that you must enter to access and make changes to the BIOS settings of your computer.

CAUTION: The password features provide a basic level of security for the data on your computer.

CAUTION: Anyone can access the data stored on your computer if it is not locked and left unattended.

NOTE: Your computer is shipped with the system and setup password feature disabled.

Assigning a system password and setup password

You can assign a new System Password and/or Setup Password or change an existing System Password and/or Setup Password

only when Password Status is Unlocked. If the Password Status is Locked, you cannot change the System Password.

NOTE: If the password jumper is disabled, the existing System Password and Setup Password are deleted and you need

not provide the system password to log on to the computer.

To enter a system setup, press <F2> immediately after a power-on or re-boot.

1. In the System BIOS or System Setup screen, select System Security and press Enter.

The System Security screen appears.

2. In the System Security screen, verify that Password Status is Unlocked.

3. Select System Password , enter your system password, and press Enter or Tab.

Use the following guidelines to assign the system password:

• A password can have up to 32 characters.

• The password can contain the numbers 0 through 9.

• Only lower case letters are valid, upper case letters are not allowed.

• Only the following special characters are allowed: space, (”), (+), (,), (-), (.), (/), (;), ([), (\), (]), (`).

Re-enter the system password when prompted.

4. Type the system password that you entered earlier and click OK.

5. Select Setup Password, type your system password and press Enter or Tab.

A message prompts you to re-type the setup password.

6. Type the setup password that you entered earlier and click OK.

7. Press Esc and a message prompts you to save the changes.

8. Press Y to save the changes.

The computer reboots.

Deleting or changing an existing system and/or setup password

Ensure that the Password Status is Unlocked (in the System Setup) before attempting to delete or change the existing System

and/or Setup password. You cannot delete or change an existing System or Setup password, if the Password Status is Locked.

To enter the System Setup, press F2 immediately after a power-on or reboot.

1. In the System BIOS or System Setup screen, select System Security and press Enter.

The System Security screen is displayed.

2. In the System Security screen, verify that Password Status is Unlocked.

3. Select System Password, alter or delete the existing system password and press Enter or Tab.

4. Select Setup Password, alter or delete the existing setup password and press Enter or Tab.

NOTE: If you change the System and/or Setup password, re-enter the new password when promoted. If you delete

the System and/or Setup password, conrm the deletion when promoted.

5. Press Esc and a message prompts you to save the changes.

6. Press Y to save the changes and exit from System Setup.

The computer reboots.

Disabling a system password

The system's software security features include a system password and a setup password. The password jumper disables any

password(s) currently in use.

NOTE: You can also use the following steps to disable a forgotten password.

1. Follow the procedures in Before Working on Your Computer.

2. Remove the cover.

3. Identify the PSWD jumper on the system board.

4. Remove the PSWD jumper from the system board.

NOTE: The existing passwords are not disabled (erased) until the computer boots without the jumper.

5. Install the cover.

NOTE: If you assign a new system and/or setup password with the PSWD jumper installed, the system disables the

new password(s) the next time it boots.

6. Connect the computer to the electrical outlet and power-on the computer.

7. Power-o the computer and disconnect the power cable from the electrical outlet.

8. Remove the cover.

9. Replace the PSWD jumper on the system board.

10. Install the cover.

11. Follow the procedures in After Working on Your Computer.

12. Power-on the computer.

13. Go to the system setup, and assign a new system or setup password. See Setting up a System Password.

Diagnostics

If you experience a problem with your computer, run the ePSA diagnostics before contacting Dell for technical assistance. The

purpose of running diagnostics is to test your computer's hardware without requiring additional equipment or risking data loss. If you

are unable to x the problem yourself, service and support personnel can use the diagnostics results to help you solve the problem.

Enhanced Pre-Boot System Assessment (ePSA) diagnostics

The ePSA diagnostics (also known as system diagnostics) performs a complete check of your hardware. The ePSA is embedded

with the BIOS and is launched by the BIOS internally. The embedded system diagnostics provides a set of options for particular

devices or device groups allowing you to:

• Run tests automatically or in an interactive mode

• Repeat tests

• Display or save test results

• Run thorough tests to introduce additional test options to provide extra information about the failed device(s)

• View status messages that inform you if tests are completed successfully

• View error messages that inform you of problems encountered during testing

CAUTION: Use the system diagnostics to test only your computer. Using this program with other computers may cause

invalid results or error messages.

NOTE: Some tests for specic devices require user interaction. Always ensure that you are present at the computer

terminal when the diagnostic tests are performed.

1. Power-on the computer.

2. As the computer boots, press the F12 key as the Dell logo appears.

3. On the boot menu screen, select the Diagnostics option.

The Enhanced Pre-boot System Assessment window is displayed, listing all devices detected in the computer. The diagnostics

starts running the tests on all the detected devices.

4. To run a diagnostic test on a specic device, press Esc and click Yes to stop the diagnostic test.

5. Select the device from the left pane and click Run Tests.

6. If there are any issues, error codes are displayed.

Note the error code and contact Dell.

Troubleshooting your computer

You can troubleshoot your computer using indicators like diagnostic lights, beep codes, and error messages during the operation of

the computer.

Power LED diagnostics

The power button LED located on the front of the chassis also functions as a bicolored diagnostic LED. The diagnostic LED is only

active and visible during the POST process. Once the operating system starts to load, it is no longer visible.

Amber LED blinking scheme – The pattern is 2 or 3 blinks followed by a short pause then x number of blinks up to 7. The repeated

pattern has a long pause inserted in the middle. For example 2,3 = 2 amber blinks, short pause, 3 amber blinks followed by long pause

then repeats.

Table 18. Power LED diagnostics

Amber LED state White LED state Description

o o system is OFF

o blinking system is in sleep state

blinking o power supply unit (PSU) failure

steady o PSU is working but failed to fetch code

o steady system is ON

Amber LED state Description

2,1 system board failure

2,2 system board, PSU or PSU cabling failure

2,3 system board, memory or CPU failure

2, 4 coin cell battery failure

2,5 corrupt BIOS

2,6 CPU conguration failure or CPU failure

2,7 memory modules are detected, but a memory failure

3,1 possible peripheral card or system board failure

3,2 possible USB failure

3,3 no memory modules are detected

3,4 possible system board error

3,5 memory modules are detected, but a memory conguration or compatibility error

3,6 possible system board resource and/or hardware failure

3,7 some other failure with messages on screen

Beep code

The computer can emit a series of beeps during start-up if the display does not show errors or problems. These series of beeps,

called beep codes, identify various problems. The delay between each beep is 300 ms, the delay between each set of beeps is 3 sec,

and the beep sound lasts 300 ms. After each beep and each set of beeps, the BIOS should detect if the user presses the power

button. If so, BIOS will jump out from looping and execute the normal shutdown process and power system.

Code 1-3-2

Cause Memory failure

Error messages

Error message Description

Address mark not

found

The BIOS found a faulty disk sector or could not nd a particular disk sector.

Error message Description

Alert! Previous

attempts at booting

this system have

failed at checkpoint

[nnnn]. For help in

resolving this

problem, please note

this checkpoint and

contact Dell

Technical Support.

The computer failed to complete the boot routine three consecutive times for the same error. Contact Dell

and report the checkpoint code (nnnn) to the support technician

Alert! Security

override Jumper is

installed.

The MFG_MODE jumper has been set and AMT Management features are disabled until it is removed.

Attachment failed to

respond

The oppy or hard drive controller cannot send data to the associated drive.

Bad command or le

name

Ensure that you have spelled the command correctly, put spaces in the proper place, and used the correct

pathname.

Bad error-correction

code (ECC) on disk

read

The oppy or hard drive controller detected an uncorrectable read error.

Controller has failed The hard drive or the associated controller is defective.

Data error The oppy or hard drive cannot read the data. For the Windows operating system, run the chkdsk utility to

check the le structure of the oppy or hard drive. For any other operating system, run the appropriate

corresponding utility.

Decreasing available

memory

One or more memory modules may be faulty or improperly seated. Re-install the memory modules and, if

necessary, replace them.

Diskette drive 0 seek

failure

A cable may be loose or the computer conguration information may not match the hardware conguration.

Diskette read failure The oppy disk may be defective or a cable may be loose. If the drive access light turns on, try a dierent

disk.

Diskette subsystem

reset failed

The oppy drive controller may be faulty.

Gate A20 failure One or more memory modules may be faulty or improperly seated. Reinstall the memory modules and, if

necessary, replace them.

General failure The operating system is unable to carry out the command. This message is usually followed by specic

information—for example, Printer out of paper. Take the appropriate action to resolve the problem.

Hard-disk drive

conguration error

The hard drive failed initialization.

Hard-disk drive

controller failure

The hard drive failed initialization.

Hard-disk drive

failure

The hard drive failed initialization.

Hard-disk drive read

failure

The hard drive failed initialization.

Error message Description

Invalid conguration

information-please

run SETUP program

The computer conguration information does not match the hardware conguration.

Invalid Memory

conguration, please

populate DIMM1

DIMM1 slot does not recognize a memory module. The module should be re-seated or installed.

Keyboard failure A cable or connector may be loose, or the keyboard or keyboard/mouse controller may be faulty.

Memory address line

failure at address,

read value expecting

value

A memory module may be faulty or improperly seated. Reinstall the memory modules and, if necessary,

replace them.

Memory allocation

error

The software you are attempting to run is conicting with the operating system, another program, or a

utility.

Memory data line

failure at address,

read value expecting

value

A memory module may be faulty or improperly seated. Reinstall the memory modules and, if necessary,

replace them.

Memory double

word logic failure at

address, read value

expecting value

A memory module may be faulty or improperly seated. Reinstall the memory modules and, if necessary,

replace them.

Memory odd/even

logic failure at

address, read value

expecting value

A memory module may be faulty or improperly seated. Reinstall the memory modules and, if necessary,

replace them

Memory write/read

failure at address,

read value expecting

value

A memory module may be faulty or improperly seated. Reinstall the memory modules and, if necessary,

replace them.

Memory size in

CMOS invalid

The amount of memory recorded in the computer conguration information does not match the memory

installed in the computer.

Memory tests

terminated by

keystroke

A keystroke interrupted the memory test.

No boot device

available

The computer cannot nd the oppy disk or hard drive.

No boot sector on

hard-disk drive

The computer conguration information in System Setup may be incorrect.

No timer tick

interrupt

A chip on the system board might be malfunctioning.

Non-system disk or

disk error

The oppy disk in drive A does not have a bootable operating system installed on it. Either replace the oppy

disk with one that has a bootable operating system, or remove the oppy disk from drive A and restart the

computer.

Not a boot diskette The operating system is trying to boot to a oppy disk that does not have a bootable operating system

installed on it. Insert a bootable oppy disk.

Error message Description

Plug and play

conguration error

The computer encountered a problem while trying to congure one or more cards.

Read fault The operating system cannot read from the oppy or hard drive, the computer could not nd a particular

sector on the disk, or the requested sector is defective.

Requested sector

not found

The operating system cannot read from the oppy or hard drive, the computer could not nd a particular

sector on the disk, or the requested sector is defective.

Reset failed The disk re-set operation failed.

Sector not found The operating system cannot locate a sector on the oppy or hard drive.

Seek error The operating system cannot nd a specic track on the oppy disk or hard drive.

Shutdown failure A chip on the system board might be malfunctioning.

Time-of-day clock

stopped

The battery might be dead.

Time-of-day not set-

please run the

System Setup

program

The time or date stored in System Setup does not match the computer clock.

Timer chip counter 2

failed

A chip on the system board may be malfunctioning.

Unexpected

interrupt in

protected mode

The keyboard controller may be malfunctioning or a memory module may be loose.

WARNING: Dell's

Disk Monitoring

System has

detected that drive

[0/1] on the

[primary/secondary]

EIDE controller is

operating outside of

normal

specications. It is

advisable to

immediately back up

your data and

replace your hard

drive by calling your

support desk or Dell.

During initial startup, the drive detected possible error conditions. When your computer nishes booting,

immediately back up your data and replace your hard drive (for installation procedures, see "Adding and

Removing Parts" for your computer type). If no replacement drive is immediately available and the drive is

not the only bootable drive, enter System Setup and change the appropriate drive setting to None. Then

remove the drive from the computer.

Write fault The operating system cannot write to the oppy or hard drive.

Write fault on

selected drive

The operating system cannot write to the oppy or hard drive.

Specications

NOTE: Oerings may vary by region. For more information regarding the conguration of your computer in:

• Windows 10, click Start → Settings → System → About.

• Windows 8.1 and Windows 8, click Start → PC Settings → PC and devices → PC Info.

•Windows 7, click Start , right-click My Computer, and then select Properties.

Table 19. Processor

Feature Specication

Processor type • Intel Core i3 series

• Intel Core i5 series

• Intel Core i7 series

• Intel Xeon E3

Total cache Up to 8 MB cache depending on processor type

NOTE: The Precision workstation 3420 has three processors that do not support onboard graphics.

Table 20. Memory

Feature Specication

Type DDR4, NECC, and ECC

Speed 2133 MHz

Connectors Four DIMM slots

Capacity 4 GB, 8 GB, and 16 GB

Minimum memory 4 GB

Maximum memory 64 GB

Table 21. Video

Feature Specication

Integrated • Intel HD Graphics 530 (Core i3/i5/i7)

• Intel HD Graphics P530 (Select Xeon)

Discrete PCI Express x16 graphics adapter

Table 22. Audio

Feature Specication

Integrated Two Channel High Denition Audio

Table 23. Network

Feature Specication

Integrated Intel I219LM Ethernet capable of 10/100/1000 Mb/s communication

Table 24. System information

Feature Specication

System chipset Intel C236 chipset

DMA channels Two 8237 DMA controllers with seven independently programmable

channels

Interrupt cevels Integrated I/O APIC capability with 24 interrupts

BIOS chip (NVRAM) 16 MB

Table 25. Expansion bus

Feature Specication

BustType PCIe gen3 (x16), USB 2.0, and USB 3.0

Bus speed PCI Express:

• x4-slot each direction speed – 4GB/s

• x16-slot each direction speed – 16 GB/s

SATA: 1.5 Gbps, 3.0 Gbps, and 6 Gbps

Table 26. Cards

Feature Specication

PCI None

PCI Express x4 Up to one low-prole card

PCI-Express x16 Up to one low-prole cards

Table 27. Drives

Feature Specication

Externally accessible (5.25-inch drive bay) One slim optical drive bay

3.5-inch SATA drive bays 2.5-inch SATA drive bays PCIe drive bay

Internally accessible One Two One

Table 28. External connectors

Feature Specication

Audio

Front panel One universal audio jack with microphone in and headphone connector

Back panel One line-out connector

Network adapter One RJ-45 connector

Serial One 9-pin connector; 16550 C compatible

USB 2.0 Front panel: two

Feature Specication

Back panel: two

USB 3.0 Front panel: two

Back panel: four

HDMI out One

Video • 15-pin VGA connector

• two 20-pin DisplayPort connectors

NOTE: Available video connectors may vary based on the

graphics card selected.

Table 29. Internal connectors

Feature Specication

PCI 2.3 data width (maximum) - 32 bits

Small Form Factor None

PCI Express x4 data width (maximum) - four PCI Express lane

Small Form Factor One 64–pin connector

PCI Express x16 (wired as x4) data width (maximum) - four PCI Express lanes

Small Form Factor None

PCI Express x16 data width (maximum) - 16 PCI Express lanes

Small Form Factor One 164-pin connector

Serial ATA

Small Form Factor Three 7-pin connectors

Memory Four 288-pin connectors

System fan One 4-pin connector

Processor One 1150-pin connector

Processor fan One 4-pin connector

Service mode jumper One 2-pin connector

Password clear jumper One 2-pin connector

RTC reset jumper One 2-pin connector

Internal speaker One 4-pin connector

Intruder connector One 3-pin connector

Power connector: One 8-pin. one 4-pin,

Table 30. Controls and lights

Feature Specication

Front of the computer

Power button light White light — Solid white light indicates power-on state; blinking white

light indicates sleep state of the computer.

Feature Specication

Drive activity light White light — Blinking white light indicates that the computer is reading

data from or writing data to the hard drive.

Back of the computer

Link integrity light on integrated network adapter Green — a 10 Mbps connection exists between the network and the

computer.

Green — a 100 Mbps connection exists between the network and the

computer.

Orange — a 1000 Mbps connection exists between the network and

the computer.

O (no light) — the computer is not detecting a physical connection to

the network.

Network activity light on integrated network adapter Yellow light — A blinking yellow light indicates that network activity is

present.

Power supply diagnostic light Green light — The power supply is turned on and is functional. The

power cable must be connected to the power connector (at the back of

the computer) and the electrical outlet.

Table 31. Power

Power Wattage Maximum heat dissipation Voltage

Small Form

Factor

180 W/240 W EPA 614/819 BTU/hr 100 V AC to 240 V AC, 50 Hz to 60

Hz, 4.0 A

NOTE: Heat dissipation is calculated by using the power supply wattage rating.

Coin cell battery 3 V CR2032 lithium coin cell

Table 32. Physical dimension

Physical Height Width Depth Weight

Small Form Factor 290.00 mm (11.41 inches) 92.60 mm (3.64

inches)

292.00 mm (11.49

inches)

6.30 kg (13.88 lb)

NOTE: The weight of your computeris based on a typical conguration and may vary with dierent congurations.

Table 33. Environmental

Feature Specication

Temperature range

Operating 5°C to 35°C (41°F to 95°F)

Storage –40°C to 65°C (–40°F to 149°F)

Relative humidity (maximum)

Operating 20 percent to 80 percent (non-condensing)

Storage 5 percent to 95 percent (non-condensing)

Maximum vibration

Operating 0.26 GRMS

Feature Specication

Storage 2.20 GRMS

Maximum shock

Operating 40 G

Storage 105 G

Altitude

Operating –15.2 m to 3048 m (–50 to 10,000 ft)

Storage –15.20 m to 10,668 m (–50 ft to 35,000 ft)

Airborne contaminant level G1 or lower as dened by ANSI/ISA-S71.04-1985

Contacting Dell

NOTE: If you do not have an active Internet connection, you can nd contact information on your purchase invoice,

packing slip, bill, or Dell product catalog.

Dell provides several online and telephone-based support and service options. Availability varies by country and product, and some

services may not be available in your area. To contact Dell for sales, technical support, or customer service issues:

1. Go to Dell.com/support.

2. Select your support category.

3. Verify your country or region in the Choose a Country/Region drop-down list at the bottom of the page.

4. Select the appropriate service or support link based on your need.

Table of Contents

DELL T3420 User Manual

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