• "Rear cover" on page 67.
• "Optical drive" on page 68.
• "Optical drive holder" on page 70.
• "System board shield" on page 71.
• "Hard disk drive and bracket" on page 77.
2. Disconnect the cover presence switch cable (intrusion switch cable) from the system board.
Replacement procedure
M70a Gen 2
M90a Gen 2
100
M70a Gen 2 and M90a Gen 2 Hardware Maintenance Manual