4. If the WLAN antenna is not connected to the terminal on the WLAN module, you must install a protective
sleeve on the antenna connector, as shown in the following illustration.
Reverse this procedure to install the WLAN module.
USB board
To remove the USB board, use this procedure and illustration.
Table 5-10 USB board description and part number
Description Spare part number
USB board M57150-001
USB board cable M57151-001
Before removing the USB board, follow these steps:
1. Prepare the computer for disassembly (see Preparation for disassembly on page 30).
2. Remove the bottom cover (see Bottom cover on page 30).
3. Remove the battery (see Battery on page 31).
4. Remove the solid-state drives (see Solid-state drive on page 33).
5. Remove the heat sink (see Heat sink on page 38).
6. Remove the left fan (see Fans on page 40).
Remove the USB board:
1. Disconnect the cable from the ZIF connector on the board (1).
2. Remove the Phillips M2.0 × 5.0 screw (2) that secures the board to the computer.
Component replacement procedures 43
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