3.Turn the lock screw one-half turn counterclockwise to release the CPU module (you should hear a light snap). Carefully lift the CPU module off of its socket on the motherboard.

Figure 2-28. Removing the CPU Module

HP Pavilion 4300, 4200, and 4100, HP nx9005 and nx9000,

Compaq Evo Notebook N1050 and 1010, and Compaq Presario 2100 and 1100 Models

Reassembly Notes

Caution

Each time you install a new CPU module, you must also replace the heat sink’s thermal pad to maintain optimum heat transfer. Use a sharp knife or scraper to carefully remove the old thermal pad from the heat sink, then attach the new thermal pad.

•The CPU module is keyed for installation, and can be inserted only one way.

•Carefully insert the CPU module into the motherboard, and turn the lock screw one-half turn clockwise to secure the CPU module.

•Be sure to replace the thermal pad on the heat sink, as described in the reassembly notes on page 2-47.

Service Manual

Removal and Replacement

2-45