System Board Shield - Lenovo ThinkCentre M90a Gen 3 Hardware Maintenance Manual

1. Turn off the computer and remove all connected devices and cables.
2. Unlock any locking device that secures the computer cover.
3. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the computer cover is facing up.
4. Remove the computer stand, if any. See "Computer stand" on page 52.
Removal procedure

System board shield

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions.
For access, remove the following parts in order, if any:
• "Computer stand" on page 52.
• "Rear I/O cover" on page 56.
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Chapter 6 Hardware removal and installation
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