Lenovo ThinkCentre M90a Gen 3 Hardware Maintenance Manual page 68

• Do not apply pressure to the internal storage drive.
• Do not make the internal storage drive subject to physical shocks or vibration. Put the internal storage
drive on a soft material, such as cloth, to absorb physical shocks.
For access, remove the following parts in order, if any:
• "Computer stand" on page 52.
• "Rear I/O cover" on page 56.
• "System board shield" on page 57.
• "VESA mount bracket" on page 58.
• "Primary hard disk drive" on page 59.
Removal procedure
Note: The secondary hard disk drive is installed in the same location as the optical drive.
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M90a Gen 3 and M90a Pro Gen3 Hardware Maintenance Manual