4. Remove the speakers from the computer (4).
Reverse this procedure to install the speakers.
USB board
To remove the USB board, use this procedure and illustration.
Table
5-11 USB board description and part number
Description Spare part number
USB board (models without WWAN) M42276-001
USB board (models with WWAN) M42277-001
USB board cable (available in the Cable Kit for models without WWAN) M42293-001
USB board cable (available in the Cable Kit for models with WWAN) M48385-001
Before removing the USB board, follow these steps:
1. Prepare the computer for disassembly (Preparation for disassembly on page 30).
2. Remove the bottom cover (Bottom cover on page 30).
3. Disconnect the battery cable from the system board (see Battery on page 31).
4. Remove the heat sink and fan assembly (Heat sink and fan assembly on page 38).
5. Remove the power button board (Power button board on page 45).
Remove the USB board:
1. Disconnect the large, at cable from the ZIF connector on the USB board (2).
2. Disconnect the touch cable from the connector on the USB board (2).
44 Chapter 5 Removal and replacement procedures for authorized service provider parts