Lenovo ThinkCentre M90t, User Manual

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Although there are no moving parts in the computer after the power cord has been disconnected, the
following warnings are required for your safety.
Keep fingers and other parts of your body away from hazardous, moving parts. If you suffer an injury, seek
medical care immediately.Never remove the cover on a power supply or any part that has the following label
attached.
Hazardous voltage, current, and energy levels are present inside any component that has this label attached.
There are no serviceable parts inside these components. If you suspect a problem with one of these parts,
contact a service technician.
Replacement procedure
1. Remove the computer cover. See “Computer cover” on page 42.
2. Remove the optical drive. See “Optical drive” on page 43.
3. Remove the front bezel. See “Front bezel” on page 46.
4. Remove the primary storage drives. See “Primary storage drives” on page 47.
5. Remove the 3.5-inch primary storage drive cage. See “3.5-inch primary storage drive cage” on page 55.
6. Remove the power supply assembly.
Chapter 7
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CRU replacement
77