4. Remove the fan (4) from the system board.
To replace the fan, reverse the removal procedures.
I/O board
To remove the I/O board, use this procedure and illustration.
Table 6-4
I/O board descriptions and part numbers
Description Spare part number
I/O board (includes nano SIM slot, RJ45 jack, and USB port)
NOTE: The I/O board spare part kit does not include the I/O board cable or the nano SIM cable. The
I/O board cable and the nano SIM cable are included in the Cable Kit, spare part number N96922-001.
For use only on computer models equipped with WWAN capability N96926-001
For use only on computer models not equipped with WWAN capability N96925-001
Before removing the I/O board, follow these steps:
1. Prepare the computer for disassembly (see Preparation for disassembly on page 50).
2. Remove the bottom cover (see Bottom cover on page 38).
3. Disconnect the battery cable from the system board (see Battery on page 50).
Remove the I/O board:
1. Release the WWAN antenna cables and the display tuner cable from the retention clips (1) that are
built into the I/O holder.
2. Release the zero insertion force (ZIF) connectors (2) the I/O board cable and nano SIM cable are
connected to, and then disconnect the I/O board cable and nano SIM cable from the I/O board.
3. Remove the four Phillips M2.0 × 4.0 screws (3) that secure the I/O board and I/O holder to
the computer.
4. Remove the I/O holder (4) from the computer.
54
Chapter 6 Removal and replacement procedures for authorized service provider parts
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