• "Optical drive" on page 27
• "Front bezel" on page 30
• "Drive bay assembly" on page 31
2. On the bottom of the drive bay assembly, disconnect the signal cable and the power cable from the 2.5-
inch secondary hard disk drive.
Removal steps
M.2 solid-state drive and heat sink
Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions.
The heat sink might be very hot. Before you open the computer cover, turn off the computer and wait several
minutes until the computer is cool.
Attention: The internal storage drive is sensitive. Inappropriate handling might cause damage and
permanent loss of data. When handling the internal storage drive, observe the following guidelines:
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ThinkCentre M70s Gen 4 ThinkCentre M90s Gen 4 User Guide