Dell OptiPlex 790 (Early 2011) Small Form Factor- Manuals

Cover 2 Removing the Cover 1. Follow the procedures in Before Working Inside Your Computer . 2. Pull up the cover-release latch at the side of the computer. 3. Lift the cover upward to a 45–degree angle and remove it from the computer. Installing The Cover 1. Place the computer cover on the chassis....

Front Bezel 3 Removing the Front Bezel 1. Follow the procedures in Before Working Inside Your Computer . 2. Remove the cover . 3. Pry the front bezel retention clips away from the chassis. 4. Rotate the bezel away from the computer to release the hooks on the opposite edge of the bezel from the chas...

Installing The Front Bezel 1. Insert the four hooks along the bottom edge of the front bezel into the slots on the chassis front. 2. Rotate the bezel toward the computer to engage the front bezel retention clips until they click into place. 3. Install the cover . 4. Follow the procedures in After Wo...

Expansion Card 4 Removing the Expansion Card 1. Follow the procedures in Before Working Inside Your Computer . 2. Remove the cover . 3. Remove the front bezel . 4. Rotate the release tab on the card-retention latch upward. 5. Pull the release lever away from the PCIe x16 card until you release the s...

Installing The Expansion Card 1. Insert the PCIe x4 card into the connector on the system board and press down to secure it in place. 2. Insert the PCIe x16 card (if any) into the connector on the system board and press down to secure it in place. 3. Install the front bezel . 4. Install the cover . ...

Optical Drive 5 Removing the Optical Drive 1. Follow the procedures in Before Working Inside Your Computer . 2. Remove the cover . 3. Remove the data cable and power cable from the back of the optical drive. 4. Lift the blue tab and slide the optical drive inwards to remove it from the computer. 5. ...

Installing The Optical Drive 1. Insert the optical drive into the bracket.2. Lift the blue tab and slide the optical drive outwards to insert it into the computer. 3. Connect the data cable and power cable to the optical drive.4. Install the cover . 5. Follow the procedures in After Working Inside Y...

Hard Drive 6 Removing the Hard Drive 1. Follow the procedures in Before Working Inside Your Computer . 2. Remove the cover . 3. Remove the hard drive from the chassis. 4. Press the retention clips inwards and slide the hard-drive bracket from the drive cage. 5. Flex the hard-drive bracket and then r...

7. Release the screws that secure the 2.5 inch hard drive to the underside of the hard-drive bracket. Installing The Hard Drive 1. Tighten the screws to secures the two hard drives to the hard drive bracket. 2. Flex the hard-drive bracket and then insert the single hard drive or two hard drives into...

Memory 7 Removing the Memory 1. Follow the procedures in Before Working Inside Your Computer . 2. Remove the cover . 3. Remove the front bezel . 4. Remove the drive cage . 5. Release the memory-retention clips on each side of the memory modules. 6. Lift the memory modules out of the connectors on th...

Installing The Memory 1. Insert the memory modules into the connectors on the system board. Install the memory modules in the order of A1 > B1 > A2 > B2. 2. Press down on the memory modules until the retention clips spring back to secure them in place. 3. Install the drive cage . 4. Install...

Chassis Intrusion Switch 8 Removing the Chassis Intrusion Switch 1. Follow the procedures in Before Working Inside Your Computer . 2. Remove the cover . 3. Disconnect the intrusion-switch cable from system board. 4. Slide the intrusion switch inwards and remove it from the system board. 23

Installing The Intrusion Switch 1. Insert the intrusion switch into the chassis rear and slide it outward to secure it. 2. Connect the intrusion-switch cable to the system board.3. Install the cover . 4. Follow the procedures in After Working Inside Your Computer . 24

Speaker 9 Removing the Speaker 1. Follow the procedures in Before Working Inside Your Computer . 2. Remove the cover . 3. Remove the front bezel . 4. Remove the drive cage . 5. Disconnect the speaker cable from the system board. 6. Unthread the speaker cable from the fan shelter clip. 7. Press the s...

8. Remove the speaker from the chassis. Installing The Speaker 1. Place the speaker on the appropriate location of the chassis rear. 2. Press the speaker-securing tab and slide the speaker towards the left of the computer to secure it. 3. Thread the internal speaker cable into the fan shelter clip. ...

Heat Sink And Processor 10 Removing the Heat Sink and Processor 1. Follow the procedures in Before Working Inside Your Computer . 2. Remove the cover . 3. Remove the front bezel . 4. Remove the drive cage . 5. Disconnect the heat-sink assembly cable from the system board. 6. Release the Input/Output...

Installing The Heat Sink And Processor 1. Insert the processor into the processor socket. Ensure the processor is properly seated. 2. Lower the processor cover.3. Press the release lever down and then move it inward to secure it with the retention hook. 4. Place the heat sink assembly into the chass...

Coin-Cell Battery 11 Removing the Coin-Cell Battery 1. Follow the procedures in Before Working Inside Your Computer . 2. Remove the cover . 3. Remove the front bezel . 4. Press the coin-cell battery inward to allow the battery to pop up from the socket. 5. Lift the coin-cell battery out of the compu...

Installing The Coin-Cell Battery 1. Place the coin-cell battery into its slot on the system board.2. Press the coin-cell battery downwards till it is secured.3. Install the front bezel . 4. Install the cover . 5. Follow the procedures in After Working Inside Your Computer . 32

Power-Switch Cable 12 Removing the Power-Switch Cable 1. Follow the procedures in Before Working Inside Your Computer . 2. Remove the cover . 3. Remove the front bezel . 4. Remove the drive cage . 5. Disconnect the power-switch cable from the system board. 6. Unthread the power-switch cable from the...

8. Slide the power-switch cable out through the front of the computer. Installing the Power-Switch Cable 1. Slide the power-switch cable in through the front of the computer.2. Secure the power-switch cable to the chassis.3. Thread the power-switch cable into the chassis clip.4. Connect the power-sw...

System Fan 13 Removing the System Fan 1. Follow the procedures in Before Working Inside Your Computer . 2. Remove the cover . 3. Remove the front bezel . 4. Remove the drive cage . 5. Remove the fan shelter . 6. Disconnect the fan cable from the system board. 7. Slide the grommets inward along the g...

9. Pry up the grommets from the system fan and remove it. Installing The System Fan 1. Insert the four grommets into the system fan. 2. Place the system fan in the chassis. 3. Pass the four grommets through the chassis and slide outward along the grooves to secure them in place. 4. Connect the fan c...

Power Supply 15 Removing the Power Supply 1. Follow the procedures in Before Working Inside Your Computer . 2. Remove the cover . 3. Remove the front bezel . 4. Remove the drive cage . 5. Remove the fan shelter . 6. Disconnect the 4-pin power cable from the system board. 7. Unthread the 4–pin power ...

Installing The Power Supply 1. Place the power supply in the chassis and slide outward to secure it.2. Tighten the three screws securing the power supply to the back of the computer. 3. Connect the power cable to the system board.4. Thread the power cable into the chassis clips.5. Connect the power ...

System Board 16 Removing the System Board 1. Follow the procedures in Before Working Inside Your Computer . 2. Remove the cover . 3. Remove the front bezel . 4. Remove the drive cage . 5. Remove the expansion cards . 6. Remove the heat sink and processor . 7. Remove the fan shelter . 8. Disconnect a...

Installing The System Board 1. Align the system board to the port connectors on the rear of the chassis and place the system board in the chassis. 2. Tighten the 7–mm hex screw securing the system board to the chassis. 3. Tighten the screws securing the system board to the chassis. 4. Close the expa...

Drive Cage 17 Removing the Drive Cage 1. Follow the procedures in Before Working Inside Your Computer . 2. Remove the cover . 3. Remove the front bezel . 4. Remove the data cable and power cable from the back of the optical drive. 5. Slide the drive-cage handle toward the back of the computer into t...

Installing The Drive Cage 1. Place the drive cage on the edge of the computer to allow access to the cable connectors on the hard drive. 2. Connect the data cable and power cable to the back of the hard drive.3. Flip over the drive cage and insert it into the chassis. The drive cage tabs are secured...

Fan Shelter 18 Removing the Fan Shelter 1. Follow the procedures in Before Working Inside Your Computer . 2. Remove the cover . 3. Unthread the cables in the fan shelter clip. 4. Lift the fan shelter free from the computer. Installing The Fan Shelter 1. Insert the fan shelter into the computer.2. Th...

System Setup 19 System Setup This computer offers you the following options:• Access System Setup by pressing <F2>• Bring up a one-time boot menu by pressing <F12>Press <F2> to enter System Setup and make changes to the user-definable settings. If you have trouble entering System S...

When you enter the <F12> or <Ctrl><Alt><F8> keystroke correctly, the computer beeps. The key sequence invokes the Boot Device Menu. Since the one-time boot menu only affects the current boot, it has the added benefit of not requiring the technician to restore the customer's b...

Action Keystroke Expand and collapse field <Enter>, left- or right-arrow key, or +/– Expand or collapse all fields < > Exit BIOS <Esc> — Remain in Setup, Save/Exit,Discard/Exit Change a setting Left or right-arrow key Select field to change <Enter> Cancel modification <Esc...

Troubleshooting 20 Diagnostic LEDs NOTE: The diagnostic LEDs only serve as an indicator of the progress through thePower-on Self-Test (POST) process. These LEDs do not indicate the problem thatcaused the POST routine to stop. The diagnostic LEDs are located on the front of the chassis next to the po...

Power Button Problem Description A possible system board resource and/or hardware failure has occurred. Troubleshooting Steps • Clear CMOS.• Disconnect all internal and external peripherals, and restart the computer. If the computer boots, add the peripheral cards back one by one until you find the ...

Code 4–3–1 Cause Memory failure above address 0FFFFh Code 4–3–3 Cause Timer-chip counter 2 failure Code 4–3–4 Cause Time-of-day clock stopped Code 4–4–1 Cause Serial or parallel port test failure Code 4–4–2 Cause Failure to decompress code to shadowed memory Code 4–4–3 Cause Math coprocessor test fa...

Specifications 21 Technical Specifications NOTE: Offerings may vary by region. For more information regarding the configuration of your computer, click Start (or Start in Windows XP) Help and Support, and then select the option to view information about your computer. Processor Processor type • Inte...

Contacting Dell 22 Contacting Dell NOTE: If you do not have an active Internet connection, you can find contactinformation 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 count...