1–20 Maintenance and Service Guide
Product Description
1. 5 D e s i g n  O ve r v i ew
This section presents a design overview of key parts and features 
of the notebook. Refer to Chapter 4, “Illustrated Parts Catalog,” 
to identify replacement parts, and Chapter 6, “Removal and 
Replacement Procedures,” for disassembly steps.
The system board provides the following device connections:
■ Audio
■ Display
■ Hard drive
■ Intel Pentium M and Celeron M processors
■ Keyboard
■ Memory module
■ Mini PCI communications devices
■ PC Card
■ Pointing stick
■ TouchPad
■ Trusted platform module (TPM) security module
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CAUTION: To properly ventilate the notebook, allow at least a 7.6-cm 
(3-inch) clearance on the left and right sides of the notebook.
The notebook uses an electric fan for ventilation. The fan is 
controlled by a temperature sensor and is designed to be turned 
on automatically when high temperature conditions exist. These 
conditions are affected by high external temperatures, system 
power consumption, power management/battery conservation 
configurations, battery fast charging, and software applications. 
Exhaust air is displaced through the ventilation grill located on 
the left side of the notebook.