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Removal and Replacement Procedures 5-51
5.8.2 Ensuring ESD Protection
When reinstalling the system board, it is important to include the grounding clip to
maximize the ESD (electrostatic discharge) protection of the computer The grounding
clip is located on the system board and is placed underneath the left rubber speaker
isolation strip.
Use the following precautions to ensure the grounding clip is in place when reinstalling
the system board:
■
The grounding clip is installed in computers that have serial numbers higher than
650XXXXXXX. When the system board is removed, the grounding clip is removed
with it. Be sure to replace the grounding clip when reinstalling the system board.
■
If you need to reinstall the clip, reinstall it by slipping the clip under the rubber
speaker isolation strip. Be sure the fingers of the grounding clip make contact with
the magnesium frame and left speaker frame. While replacing screws in the system
board during reinstallation, secure the clip in place with screw number 2 as shown in
Figure 5-55.
■
Include or replace the grounding clip whenever any service activity involves the
removal and replacement of the system board. Failure to do so compromises the
ESD protection of the computer.
5.8.3 Heatsink and Video Chip Heatpipe
To remove the heatsink, complete the following procedures:
1. Disconnect the AC power and any external devices (Section 5.3.1).
2. Undock the computer from the auxiliary base, if necessary (Section 5.3.2).
3. Remove all battery packs (Section 5.4.3).
4. Remove the pointing device (Section 5.3.5).
5. Remove the hard drive. (Section 5.3.6).
6. Remove the memory cover (Section 5.5.1).
7. Remove the CPU base cover (Section 5.5.4).
8. Remove the processor shield and the processor (Section 5.5.5).
9. Remove the CPU cover/keyboard assembly (Section 5.5.6).
10. Remove the display assembly (Section 5.6).
11. Remove the clutch cover (Section 5.7.1).
12. Remove the clutch cover (Section 5.7.1).