Lenovo ThinkCentre M90t User Manual page 80

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 optical drive cage. See "Optical drive cage" on page 63.
5. Remove the plastic holder from the chassis beam. See "Graphics card and plastic holder" on page 70.
6. Remove the chassis beam. See "Chassis beam" on page 71.
7. Remove the memory module.
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M90t User Guide