Dell OPTIPLEX 990 Service Manual

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Turning Off Your ComputerCAUTION: To avoid losing data, save and close all open files and exit all openprograms before you turn off your computer.1. S

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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

Installing the Cover1. Place the cover on the computer.2. Press down on the cover till it clicks into place.3. Follow the procedures in After Working

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 onthe chassis front.2. Rotate the bezel toward t

4Expansion Card TabRemoving the Expansion Card1. Follow the procedures in Before Working Inside Your Computer.2.Remove the cover.3.Push the release ta

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

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

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Dell OptiPlex 990 Mini-Tower ServiceManualRegulatory Model D09MRegulatory Type D09M001

5Optical DriveRemoving the Optical Drive1. Follow the procedures in Before Working Inside Your Computer.2.Remove the cover.3.Remove the front bezel.4.

Installing The Optical Drive1. Slide up the optical-drive latch and push the optical drive from the fronttowards the back of the computer.2. Connect t

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

6. Repeat the above steps for the second hard drive, if available.Installing The Hard Drive1. Flex the hard-drive bracket and then insert the hard dri

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. Installthe memory module in the order of A1 > B1 > A2

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

Installing the Intrusion Switch1. Insert the intrusion switch into the chassis rear and slide it toward thechassis top to secure it.2. Connect the int

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 secureit.2. Thread the speaker cable into the chassis clip.3

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

10Heat SinkRemoving the Heat Sink and Processor1. Follow the procedures in Before Working Inside Your Computer.2.Remove the cover.3.Disconnect the hea

6. Press the release lever down and then move it outwards to release it fromthe 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 the processor isproperly seated.2. Lower the processor

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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 rele

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 fro

8. Pry the power-switch cable free.9. Slide the power-switch cable out through the front of the computer.Installing the Power-Switch Cable1. Slide the

5. Install the optical drive.6. Install the front bezel.7. Install the cover.8. Follow the procedures in After Working Inside Your Computer.37

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ContentsNotes, Cautions, and Warnings1 Working on Your ComputerBefore Working Inside Your Computer...

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

Installing the Front Thermal Sensor1. Secure the thermal sensor to the chassis front.2. Thread the thermal sensor cable into the chassis clips.3. Conn

14Chassis FanRemoving The System Fan1. Follow the procedures in Before Working Inside Your Computer.2. Remove the cover.3. Disconnect the system fan c

Installing the System Fan1. Place the system fan in the chassis.2. Pass the four grommets through the chassis and slide outward along thegrooves to se

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

7. Slide the Input/Output panel towards the left of the computer to release it.8. Remove the Input/Output panel by routing the cable through the front

3. Tighten the single screw to secure the Input/Output panel to the chassis.4. Thread the Input/Output panel or the FlyWire cable into the chassis cli

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16Power SupplyRemoving The Power Supply1. Follow the procedures in Before Working Inside Your Computer.2. Remove the cover.3. Disconnect the power cab

6. Disconnect the 4-pin power cable from the system board.7. Remove the screws that secure the power supply to the back of thecomputer.8. Push in on t

Installing the Memory...248 Chassis Intrusion Switch

9. 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 thecomp

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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.R

8. Slide the system board towards the front of the computer.9. Tilt the system board to 45–degrees, and then lift the system board out ofthe computer.

18System SetupSystem SetupThis computer offers you the following options:• Access System Setup by pressing <F2>• Bring up a one-time boot menu b

Partition. The benefit here is that you do not have to remember the<Ctrl><Alt><D> and <Ctrl><Alt><F10> keystrokes

Beep Codes and Text Error MessagesThe OptiPlex BIOS is capable of displaying error messages in plain English,along with beep codes. If the BIOS determ

GeneralMemory Technology, DIMM 1 Size, DIMM 2 Size, DIMM 3Size, and DIMM 4 Size.• Processor Information: Displays Processor Type, CoreCount, Processor

System ConfigurationSerial Port Allows you to define the serial port settings. You can set theserial port to:• Disabled• Auto• COM1• COM2• COM3• COM4N

System ConfigurationIf USB port is disabled, the OS cannot see any device attachedto this port.• Enable USB Controller• Disable USB Mass Storage Dev•

16 Power Supply 47Removing The Power Supply...47Installing the

Security• System Password MaxPassword Bypass Allows you to bypass the System (Boot) Password and theinternal HDD password prompts during a system rest

SecurityChassis Intrusion Allows you to enable or disable the chassis intrusion feature.You can set this option to:• Clear Intrusion Warning — Enabled

PerformanceIntel® TurboBoost™ Allows you to enable or disable Inel TurboBoost mode of theprocessor.• Disabled — Does not allow the TurboBoost driver t

Power ManagementWake on LAN This option allows the computer to power up from the off statewhen triggered by a special LAN signal. Wake-up from theStan

Virtualization Supportprovided by Intel® Virtualization Technology. Enable Intel®Virtualization Technology — This option is enabled by default.VT for

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

System Logs• Clear LogDellDiag Events Displays the DellDiag event log.Thermal Events Displays the thermal event log and allows you to:• Clear LogPower

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19TroubleshootingDiagnostic LEDsNOTE: The diagnostic LEDs only serve as an indicator of the progress through thePower-on Self-Test (POST) process. The

• Ensure that any power strips being used are pluggedinto an electrical outlet and are turned on.• Ensure that the electrical outlet is working by tes

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• If the LED still does not illuminate, the problem is withthe power supply.LEDPower ButtonProblemDescriptionMemory modules are detected, but a memory

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

• 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 typeinto your computer.LEDPower ButtonProblem Description A possible hard drive failure has occurre

LEDPower ButtonProblem Description Memory modules are detected, but a memory configuration orcompatibility error has occurred.Troubleshooting Steps• E

Problem Description A possible system board resource and/or hardware failure hasoccurred.TroubleshootingSteps• Clear CMOS.• Disconnect all internal an

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

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

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

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

1Working on Your ComputerBefore Working Inside Your ComputerUse the following safety guidelines to help protect your computer from potentialdamage and

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 operatingsystem, another program, or a utility.Memor

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, thecomputer could not find a particular sector on the disk, or t

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

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

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20SpecificationsTechnical SpecificationsNOTE: Offerings may vary by region. For more information regarding theconfiguration of your computer, click St

MemoryDesktop, Mini-Tower, Small FormFactor16 GBUltra Small Form Factor 8 GBVideoIntegrated• Intel HD Graphics (with Intel Celeron/Pentium-class CPU-G

CAUTION: When you disconnect a cable, pull on its connector or on its pull-tab, noton the cable itself. Some cables have connectors with locking tabs;

Expansion Bus• x16-slot bidirectional speed – 16 GB/sSATA: 1.5 Gbps, 3.0 Gbps, and 6 GbpsCardsPCIMini-Tower up to one full-height cardDesktop up to on

DrivesMini-TowertwoDesktoponeSmall Form Factorone slim optical drive bayUltra Small Form Factorone slim optical drive bayInternally Accessible:3.5–inc

External ConnectorsMini-Tower, Desktop, Small FormFactorFront Panel: 4Back Panel: 6Ultra Small Form Factor Front Panel: 2Back Panel: 5Video 15-pin VGA

System Board ConnectorsMini PCI Express data width (maximum) —one PCI Express lane and one USBinterfaceMini-Tower, Desktop,Small Form FactornoneUltra

System Board ConnectorsProcessor one 1155-pin connectorProcessor Fan one 5-pin connectorService mode jumper one 2-pin connectorPassword clear jumper o

Controls and Lightssee the Service Manual atsupport.dell.com/manuals.Back of the computer:Link integrity light on integratednetwork adapterGreen — a g

Power Wattage MaximumHeatDissipationVoltageMini-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

EnvironmentalStorage 2.2 GRMSMaximum shock:Operating 40 GStorage 105 GAltitude:Operating –15.2 m to 3048 m (–50 ft to 10,000 ft)Storage –15.2 m to 10,

21Contacting DellContacting DellTo contact Dell for sales, technical support, or customer service issues:1. Visit support.dell.com.2. Verify your coun

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