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9. Remove the top cover (see Top cover on page 48).
10. Remove the system board (see
System board on page 66).
Remove the optical drive cable:
1. Release the optical drive cable from the clips built into the base enclosure.
2. Release the optical drive connector from the base enclosure by prying the clips (1) that secure
the optical drive connector to the base enclosure.
3. Remove the optical drive cable from the base enclosure (2).
Reverse this procedure to install the optical drive cable.
USB board
Description Spare part number
USB board (includes cable) 683547-001
Before removing the USB board, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn
the computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet
and then unplugging the AC adapter from the computer.
4. Remove the battery (see
Battery on page 32).
5. Remove the service door (see
Service door on page 33).
6. Remove the optical drive (see
Optical drive on page 34).
7. Remove the hard drive (see
Hard drive on page 36)
64 Chapter 4 Removal and replacement procedures