IBM ThinkCentre 8143 - Locating Components; Identifying Parts on the System Board

Locating components
The following illustration will help you locate the various components in your
computer.
1 DIMMs
2 Power supply
3 Hard disk drive
4 PCI slot
5 Optional PCI adapter
Identifying parts on the system board
The system board (sometimes called the planar or motherboard) is the main circuit
board in your computer. It provides basic computer functions and supports a
variety of devices that are IBM-installed or that you can install later.
Chapter 1. Installing options 11