Lenovo ThinkCentre M90a Gen 3 Hardware Maintenance Manual page 83

• "Computer stand" on page 52.
• "Rear I/O cover" on page 56.
• "System board shield" on page 57.
• "VESA mount bracket" on page 58.
• "Cover presence switch (intrusion switch)" on page 59.
• "Primary hard disk drive" on page 59.
• "Secondary hard disk drive and bracket" on page 61.
• "Optical drive" on page 60.
• "M.2 solid-state drive" on page 63.
• "Memory module" on page 63.
• "Wi-Fi card and Wi-Fi card shield" on page 64.
• "Serial connector module" on page 65.
• "Card reader board" on page 66.
• "GPU card" on page 66.
• "System fan" on page 67.
• "Heat sink" on page 68.
• "Microprocessor" on page 68.
• "System board" on page 69.
• "Power supply assembly (with AC-in bracket)" on page 73.
• "Integrated camera and microphone module" on page 72.
• "Side I/O brackets" on page 74.
• "Main frame" on page 75.
Removal procedure
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Chapter 6 Hardware removal and installation