Chapter 2 Replacing Hardware; Removing The Computer Cover - Lenovo 30221CU - H230 CORE2DUO 500GB Desktop Hardware Replacement Manual

Replacing hardware
Chapter
Attention
Do not remove the computer cover or attempt any repair before reading the
"Important safety information" in the Safety and Warranty Guide that was
included with your computer or in the Hardware Maintenance Manual (HMM)
for the computer. To obtain copies of the Safety and Warranty Guide or
HMM, go to the Support Web site at
http://consumersupport.lenovo.com
Note: Use only parts provided by Lenovo.

Removing the computer cover

Important
Turn off the computer and wait 3 to 5 minutes to let the computer cool
before removing the computer cover.
To remove the computer cover:
1. Before removing any media (diskettes, CDs, or memory cards) from the drives,
shut down your operating system, turn off all attached devices, and the
computer.
2. Unplug all power cords from electrical outlets.
3. Disconnect all cables attached to the computer. This includes power cords,
input/output (I/O) cables, and any other cables that are connected to the
computer. Refer to "Locating connectors on the rear of the computer".

Hardware Replacement Guide
31039394_3000 H_HRG_EN_V2.0.indd12 12 2009.7.14 4:15:42 PM