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User manual Dell, model OptiPlex 990

Manafacture: Dell
File size: 16.4 mb
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Language of manual:en
Free link for this manual available at the bottom of the page



manual abstract


3. Thread the system-fan cable into the chassis clips. 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 Your Computer. 15 Input/Output Panel Removing The Input/Output Panel 1. Follow the procedures in Before Working Inside Your Computer. 2. Remove the cover. 3. Remove the front bezel. 4. Disconnect the Input/Output panel or the FlyWire cable from the system board. 5. Remove the screw that secures the Input/Output panel to the chassis. 6. Slide the Input/Output panel towards the right of the system to release from chassis. 7. Remove the Input/Output panel. Installing The Input/Output Panel 1. Insert the Input/Output panel into the slot on the chassis front. 2. Slide the Input/Output panel towards the left of the computer to secure to the chassis. 3. Tighten the screw to secure the Input/Output panel to the chassis. 4. Connect the Input/Output panel or the FlyWire cable to the system board. 5. Install the front bezel. 6. Install the cover. 7. Follow the procedures in After Working Inside Your Computer. 16 Power Supply Removing The Power Supply 1. Follow the procedures in Before Working Inside Your Computer. 2. Remove the cover. 3. Remove the PSU thermal sensor. 4. Disconnect the 4–pin power cable from the system board. 5. Unthread the 4–pin power cable from the chassis clips. 6. Disconnect the 24–pin power cable from the system board. 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 the blue release tab beside the power supply, and slide the power towards the front of the computer. 10. Lift the power supply out of the computer. Installing The Power Supply 1. Place the power supply in the chassis and slide towards the back of the computer to secure it. 2. Tighten the screws to secure the power supply from the back of the computer. 3. Thread the 24–pin power cable into the chassis clip. 4. Connect the 24–pin power cable to the system board. 5. Thread the 4–pin power cable into the chassis clips. 6. Connect the 4–pin power cable to the system board. 7. Install the PSU thermal sensor. 8. Install the cover. 9. Follow the procedures in After Working Inside Your Computer. 17 System Board 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 hard drive. 5. Remove the expansion cards. 6. Remove the heat sink and processor. 7. Disconnect all the cables connected to the system board. 8. Lift and release the expansion-card latch to gain access to the screws securing the system board. 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 board from the chassis. Installing The System Board 1. Align the system board to the port connectors on the back of the chassis and place the system board in the chassis. 2. Tighten the screws securing the system board to the chassis. 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. Install the hard drive. 8. Install the front bezel. 9. Install the cover. 10. Follow the procedures in After Working Inside Your Computer. 18 Power Supply Unit (PSU) Thermal Sensor Removing The PSU Thermal Sensor 1. Follow the procedures in Before Working Inside Your Computer. 2. Remove the cover. 3. Disconnect the thermal-sensor cable from the system board. 4. Unthread the thermal-sensor cable from the chassis clip. 5. Pry the thermal sensor away from the power supply and remove from the chassis. Installing The PSU Thermal Sensor 1. Secure the thermal sensor to the power supply. 2. Thread the thermal-sensor cable into the chassis clip. 3. Connect the thermal-sensor cable to the system board. 4. Install the cover. 5. Follow the procedures in After Working Inside Your Computer. 19 System Setup System Setup This computer offers you the following options: • Access System Setup by pressing • Bring up a one-time boot menu by pressing Press to enter System Setup and make changes to the user-definable settings. If you have trouble entering System Setup using this key, press when the keyboard LEDs first flash. Boot Menu This feature gives users a quick and convenient mechanism to bypass the System Setup- defined boot device order and boot directly to a specific device (for example: floppy, CD- ROM, or hard drive). Keystroke Function one-time boot and diagnostics utility menu one-time boot and diagnostics utility menu Boot Menu Enhancements The boot menu enhancements are as follows: • Easier access — Although the keystroke still exists and can be used to call up the menu, simply press during system boot to access the menu. • User prompting — Not only is the menu...


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