Lenovo 90BX E50–00 Series Hardware Maintenance Manual page 29

Hardware components
The following illustration shows the components that make up your computer.
1. Microprocessor fan and heatsink
2. Memory modules
3. Optical drive
Identifying parts on the motherboard
The motherboard (sometimes called the planar or system board) is the main circuit board in your computer.
It provides basic computing functions and supports a variety of devices that are factory-installed or that
you can install later. The following illustration shows the location of connectors and components on the
front of the motherboard.
4. Hard disk drive
5. System fan
.
Chapter 7 Locating connectors, controls and components
23