Lenovo ThinkCentre M90a Pro Gen4 Hardware Maintenance Manual page 86

• "Rear I/O cover" on page 54.
• "System board shield" on page 55.
• "OSD button and OSD bracket" on page 56
• "VESA mount bracket" on page 57.
• "Cover presence switch (intrusion switch)" on page 58.
• "Hard disk drive" on page 59.
• "Optical drive" on page 59.
• "M.2 solid-state drive" on page 61.
• "Thunderbolt card" on page 62
• "Memory module" on page 63.
• "Wi-Fi card and Wi-Fi card shield" on page 64.
• "Card reader board" on page 64.
• "GPU card" on page 65.
• "System fan" on page 66.
• "Heat sink" on page 67.
• "Microprocessor" on page 68.
• "System board" on page 69.
• "Power supply assembly" on page 72.
• "Integrated camera and microphone module" on page 72.
• "Side I/O bezel" on page 74.
• "Right bezel" on page 74.
• "Internal speakers" on page 75
• "Main frame" on page 76.
• "Wi-Fi antennas" on page 77
• "Front decoration cover" on page 78
2. Record the cable routing and cable connections, and then disconnect all cables from the LCD panel.
Removal procedure
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M90a Pro Gen4 Hardware Maintenance Manual