Dell OptiPlex 790 (Early 2011) User Manual

Dell OptiPlex 790 Desktop Owner's ManualRegulatory Model: D05DRegulatory Type: D05D001

NOTE: The color of your computer and certain components may appear differently than shown in this document.To avoid damaging your computer, perform th

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22Contacting DellContacting DellNOTE: If you do not have an active Internet connection, you can find contact information on your purchase invoice, pac

Click Start , then click the arrow in the lower-right corner of the Start menu as shown below, and then click Shut Down.– In Windows XP:Click Start →

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2CoverRemoving the Cover1. Follow the procedures in Before Working Inside Your Computer.2. Pull up the cover-release latch at the side of the computer

3. Follow the procedures in After Working Inside Your Computer.14

3Front BezelRemoving the Front Bezel1. Follow the procedures in Before Working Inside Your Computer.2. Remove the cover.3. Pry the front bezel retenti

Installing The Front Bezel1. Insert the hooks along the bottom edge of the front bezel into the slots on the chassis front.2. Rotate the bezel towards

4Expansion CardRemoving the Expansion Card1. Follow the procedures in Before Working Inside Your Computer.2. Remove the cover.3. Rotate the release ta

6. Lift the PCI expansion card (if any) up and out of its connector and remove it from the computer.7. Lift the PCI x4 expansion card (if any) up and

Installing The Expansion Card1. Insert the PCIe x4 card into the connector on the system board and press down to secure it in place.2. Insert the PCIe

Notes, Cautions, and WarningsNOTE: A NOTE indicates important information that helps you make better use of your computer.CAUTION: A CAUTION indicates

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5Optical DriveRemoving the Optical Drive1. Follow the procedures in Before Working Inside Your Computer.2. Remove the cover.3. Remove the front bezel.

Installing The Optical Drive1. Slide down the optical-drive latch and push the optical drive from the front towards the back of the computer.2. Connec

6Hard DriveRemoving the Hard Drive1. Follow the procedures in Before Working Inside Your Computer.2. Remove the cover.3. Remove the data cable and pow

6. Turn over the hard-drive bracket and release the screws that secure the 2.5 inch hard drive to the underside of the bracket.7. Flex the hard-drive

9. Release the screws that secure the 2.5 inch hard drive to the underside of the hard drive bracket.Installing The Hard Drive1. Tighten the screws to

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7MemoryRemoving the Memory1. Follow the procedures in Before Working Inside Your Computer.2. Remove the cover.3. Release the memory-retention clips on

Installing The Memory1. Insert the memory modules into the connectors on the system board. Install the memory module in the order of A1 > B1 > A

8Chassis Intrusion SwitchRemoving the Chassis Intrusion Switch1. Follow the procedures in Before Working Inside Your Computer.2. Remove the cover.3. D

ContentsNotes, Cautions, and Warnings...21 Working on Your Computer...

Installing The Chassis Intrusion Switch1. Insert the intrusion switch into the chassis rear and slide it toward the chassis top to secure it.2. Connec

9SpeakerRemoving The Speaker1. Follow the procedures in Before Working Inside Your Computer.2. Remove the cover.3. Disconnect the speaker cable from t

Installing The Speaker1. Press the speaker-securing tab and slide the speaker downward to secure it.2. Thread the speaker cable into the chassis clip.

10Heat Sink And ProcessorRemoving The Heat Sink and Processor1. Follow the procedures in Before Working Inside Your Computer.2. Remove the cover.3. Di

6. Press the release lever down and then move it outward to release it from the retention hook that secures it.7. Lift the processor cover.8. Lift the

Installing The Heat Sink and Processor1. Insert the processor into the processor socket. Ensure that the processor is properly seated.2. Lower the pro

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11Coin-Cell BatteryRemoving The Coin-Cell Battery1. Follow the procedures in Before Working Inside Your Computer.2. Remove the cover.3. Press the coin

Installing The Coin-Cell Battery1. Place the coin-cell battery into its slot on the system board.2. Press the coin-cell battery downwards until it is

12Power-Switch CableRemoving The Power-Switch Cable1. Follow the procedures in Before Working Inside Your Computer.2. Remove the cover.3. Remove the f

Installing The Memory...288 Chassis Intrusion Switch

Installing The Power-Switch Cable1. Slide the power-switch cable in through the front of the computer.2. Secure the power-switch cable to the chassis.

13Front Thermal SensorRemoving The Front Thermal Sensor1. Follow the procedures in Before Working Inside Your Computer.2. Remove the cover.3. Remove t

7. Pry the thermal sensor away from the chassis front and remove.Installing The Front Thermal Sensor1. Secure the thermal sensor to the chassis front.

14System FanRemoving The System Fan1. Follow the procedures in Before Working Inside Your Computer.2. Remove the cover.3. Remove the front bezel.4. Di

7. Lift and remove the system fan out of the computer.8. Pry up and remove the four grommets from the system fan.Installing The System Fan1. Place the

4. Connect the system-fan cable to the system board.5. Install the front bezel.6. Install the cover.7. Follow the procedures in After Working Inside Y

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15Input/Output PanelRemoving The Input/Output Panel1. Follow the procedures in Before Working Inside Your Computer.2. Remove the cover.3. Remove the f

7. Remove the Input/Output panel.Installing The Input/Output Panel1. Insert the Input/Output panel into the slot on the chassis front.2. Slide the Inp

16Power SupplyRemoving The Power Supply1. Follow the procedures in Before Working Inside Your Computer.2. Remove the cover.3. Remove the PSU thermal s

16 Power Supply...49Removing The Power Supply...

7. Unthread the 24–pin power cable from the chassis clip.8. Remove the screws that secure the power supply to the back of the computer.9. Push in on t

10. Lift the power supply out of the computer.Installing The Power Supply1. Place the power supply in the chassis and slide towards the back of the co

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17System BoardRemoving The System Board1. Follow the procedures in Before Working Inside Your Computer.2. Remove the cover.3. Remove the front bezel.4

9. Remove the screws that secure the system board to the chassis.10. Slide the system board towards the front of the computer.11. Remove the system bo

3. Close the expansion-card latch.4. Connect the cables to the system board.5. Install the heat sink and processor.6. Install the expansion card.7. In

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18Power Supply Unit (PSU) Thermal SensorRemoving The PSU Thermal Sensor1. Follow the procedures in Before Working Inside Your Computer.2. Remove the c

Installing The PSU Thermal Sensor1. Secure the thermal sensor to the power supply.2. Thread the thermal-sensor cable into the chassis clip.3. Connect

19System SetupSystem SetupThis computer offers you the following options:• Access System Setup by pressing <F2>• Bring up a one-time boot menu b

Data error ...82Decreasing available mem

benefit here is that you do not have to remember the <Ctrl><Alt><D> and <Ctrl><Alt><F10> keystrokes (although they

NavigationThe computer setup can be navigated by either the keyboard or the mouse.Use the following keystrokes to navigate the BIOS screens:Action Key

GeneralBoot Sequence Allows you to specify the order in which the computer attempts to find an operating system. The options are:• Diskette drive• USB

System ConfigurationNOTE: The operating system may allocate resources even though the setting is disabled.SATA Operation Allows you to configure the o

VideoMulti-Display Allows you to enable or disable Multi-Display. It should be enabled for Windows 7 32/64-bit only. .Enable Multi-Display — This opti

SecurityPassword Change Allows you to determine whether changes to the System and Hard Disk passwords are permitted when an administrator password is

Securitythese settings are capable of preventing access to Intel RAID (CTRL+I) or Intel Management Engine BIOS Extension (CTRL+P/F12)• Enable — User m

Power ManagementAC Recovery Determines how the system responds when AC power is re-applied after a power loss. You can set the AC Recovery to:• Power

POST BehaviorNumlock LED Allows you to enable or disable the Numlock feature when your computer starts. This option is enabled by default.Keyboard Err

MaintenanceSERR Messages Controls the SERR message mechanism. This option is not set by default. Some graphics cards require that the SERR message mec

Time-of-day clock stopped ...87Time-of-day not set-please run the S

Image ServerNOTE: This field is only relevant when the "Integrated NIC" control in the "System Configuration" group is set to &quo

20TroubleshootingDiagnostic LEDsNOTE: The diagnostic LEDs only serve as an indicator of the progress through the Power-on Self-Test (POST) process. Th

– Ensure that any power strips being used are plugged into an electrical outlet and are turned on.– Ensure that the electrical outlet is working by te

– If the LED still does not illuminate, the problem is with the power supply.LEDPower ButtonProblem DescriptionMemory modules are detected, but a memo

Problem Description A possible system board failure has occurred.Troubleshooting Steps Remove all peripheral cards from the PCI and PCI-E slots and re

– If the problem persists, the system board is faulty.LEDPower ButtonProblem Description A possible coin cell battery failure has occurred.Troubleshoo

– If available, install working memory of the same type into your computer.LEDPower ButtonProblem Description A possible hard drive failure has occurr

LEDPower ButtonProblem Description Memory modules are detected, but a memory configuration or compatibility error has occurred.Troubleshooting Steps–

Troubleshooting Steps– Clear CMOS.– Disconnect all internal and external peripherals, and restart the computer. If the computer boots, add the periphe

Cause Microprocessor register failureCode 1-1-3Cause NVRAMCode 1-1-4Cause ROM BIOS checksum failureCode 1-2-1Cause Programmable interval timerCode 1-2

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Cause Keyboard Controller Test failureCode 3-3-1Cause NVRAM power lossCode 3-3-2Cause NVRAM configurationCode 3-3-4Cause Video Memory Test failureCode

Cause Timer-chip counter 2 failureCode 4–3–4Cause Time-of-day clock stoppedCode 4–4–1Cause Serial or parallel port test failureCode 4–4–2Cause Failure

Alert! Security override Jumper is installed.Description The MFG_MODE jumper has been set and AMT Management features are disabled until it is removed

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

Hard-disk drive controller failureDescription The hard drive failed initialization.Hard-disk drive failureDescription The hard drive failed initializa

Memory allocation errorDescription The software you are attempting to run is conflicting with the operating system, another program, or a utility.Memo

Memory tests terminated by keystrokeDescription A keystroke interrupted the memory test.No boot device availableDescription The computer cannot find t

Read faultDescription The operating system cannot read from the floppy or hard drive, the computer could not find a particular sector on the disk, or

Time-of-day not set-please run the System Setup programDescription The time or date stored in System Setup does not match the computer clock.Timer chi

Write fault on selected driveDescription The operating system cannot write to the floppy or hard drive.X:\ is not accessible. The device is not readyD

1Working on Your ComputerBefore Working Inside Your ComputerUse the following safety guidelines to help protect your computer from potential damage an

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21SpecificationsTechnical SpecificationsNOTE: Offerings may vary by region. For more information regarding the configuration of your computer, click S

MemoryDesktop, Mini-Tower, Small Form Factorfour DIMM slotsUltra Small Form Factor two DIMM slotsCapacity 1 GB, 2 GB, and 4 GBMinimum Memory 1 GBMaxim

Expansion Bus• x1-slot bidirectional speed – 500 MB/s• x16-slot bidirectional speed – 16 GB/sSATA: 1.5 Gbps, 3.0 Gbps, and 6.0 GbpsCardsPCIMini-Tower

DrivesSmall Form Factor one slim line bayUltra Small Form Factor one slim line bayInternally Accessible:3.5–inch SATA drive baysMini-Tower twoDesktop

External ConnectorsUltra Small Form Factor Front Panel: 2Back Panel: 5Video 15-pin VGA connector, 20-pin DisplayPort connectorNOTE: Available video co

System Board ConnectorsMini-Tower, Desktop, Small Form Factorfour 240-pin connectorsUltra Small Form Factor two 240-pin connectorsInternal USBMini-Tow

Controls and LightsBlinking amber light indicates a problem with the system board.Drive activity light Blue light — Blinking blue light indicates that

PowerWattage Maximum Heat DissipationVoltageMini-Tower 265 W 1390 BTU/hr 100 VAC to 240 VAC, 50 Hz to 60 Hz, 5.0 ADesktop 250 W 1312 BTU/hr 100 VAC to

EnvironmentalMaximum vibration:Operating 0.25 GRMSStorage 0.5 GRMSMaximum shock:Operating 40 GStorage 105 GAltitude:Operating –15.2 m to 3048 m (–50 f