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Precision 5560 Service Manual

PDF

Removing the system board

Prerequisites

  1. Follow the procedure in Before working inside your computer.
    NOTE:Before disconnecting the cables from the system board, note the location of the connectors so that you can reconnect the cables correctly after you replace the system board.
    NOTE:The Service Tag of your computer is stored in the system board. Enter the Service Tag in the BIOS setup program after you replace the system board.
    NOTE:Replacing the system board removes any changes that you have made to the BIOS using the BIOS setup program. Make the appropriate changes again after you replace the system board.
    NOTE: After your computer is reassembled and powered on, it prompts for the Real Time Clock (RTC) reset. When the RTC reset cycle occurs, the computer restarts several times and then an error message is displayed- "Time of day not set". Enter the BIOS when this error appears and set the date and time on your computer to resume normal functionality.
  2. Remove the base cover.
  3. Remove the battery.
  4. Remove the speakers.
  5. Remove the memory.
  6. Remove the solid state drive1.
  7. Remove the solid state drive2.
  8. Remove the heat sink.
    NOTE:The system board can be removed or installed together with the heat sink attached. This simplifies the procedure and avoids breaking the thermal bond between the system board and the heat sink.
  9. Remove the left fan.
  10. Remove the right fan.
  11. Remove the I/O board.

About this task

The following image indicates the connectors on your system board.
Figure 1. System-board connectors
Image: System board connectors
  1. Fingerprint reader-board cable
  2. Antenna cables
  3. Keyboard control-board cable

The following images indicate the location of the system board and provide a visual representation of the removal procedure.

Image: Removing the system board

Image: Disconnecting the system board

Image: Handling the system board

Steps

  1. Loosen the three captive screws that secure the display-assembly cable bracket to the system board.
  2. Lift the display-assembly cable bracket off the system board.
  3. Remove the two screws (M1.6x3) that secure the display-assembly cable holder to the palm-rest and keyboard assembly.
  4. Disconnect the touch screen cable and camera cable.
  5. Remove the screw (M1.6x3) that secures the wireless-card bracket to the system board.
  6. Using a plastic scribe, disconnect the antenna cables from the wireless card.
  7. Open the latch, and disconnect the fingerprint reader-board cable from the system board.
  8. Remove the two screws (M2x4) that secure the USB Type-C bracket to the palm-rest and keyboard assembly.
  9. Lift the USB Type-C bracket from the palm-rest and keyboard assembly.
  10. Open the latch, and disconnect the keyboard-control board cable the system board.
  11. Remove the two screws (M2x4) that secure the system board to the palm-rest and keyboard assembly.
  12. Lift the system board off the palm-rest and keyboard assembly.
    NOTE:When handling the system board, hold the system board firmly at the top and bottom. DO NOT hold the system board at the thin areas on the sides at the left and right.
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