Maintenance & Service Guide

USB board
Table 5-11 USB board, cable, and bracket descriptions and part numbers
Description Spare part number
USB board L44578-001
USB board cable (included in Cable Kit) L45087-001
Thermal bracket (included in Bracket Kit) L77275-001
Before removing the USB board, follow these steps:
1. Prepare the computer for disassembly (Preparation for disassembly on page 33).
2. Place the computer in Battery Safe mode (Battery Safe mode on page 33).
3. Remove the bottom cover (Bottom cover on page 34).
4. Remove the battery (Battery on page 36).
Remove the USB board:
1. Remove the two Phillips M2.0 × 4.0 screws (1) that secure the thermal bracket to the computer.
2. Lift the bracket out of the computer (2).
3. Disconnect the cable from the ZIF connector on the USB board (1).
4. Remove the Phillips M2.5 × 4.0 screw (2) that secures the board to the computer.
Component replacement procedures 51