Lenovo ThinkCentre M90a Gen 3 Hardware Maintenance Manual page 59

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.
Replacement procedure
Depending on your computer stand, refer to one of the following to replace the computer stand.
• Full-function monitor stand
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Chapter 6 Hardware removal and installation