Lenovo 12B800DDGE Hardware Maintenance Manual page 79

Before you open the computer cover, turn off the computer and wait several minutes until the computer is
cool.
For access, remove the following parts in order:
• Remove the computer stand. See "Computer stand" on page 49.
• Remove the rear cover. See "Rear cover" on page 52.
• Remove the USB board. See "USB board" on page 53.
• Remove the system board shielding. See "System board shielding" on page 54.
• Remove the M.2 solid-state drive and thermal pad. See "M.2 solid-state drive and thermal pad" on page
55.
• Remove the Wi-Fi card. See "Wi-Fi card" on page 57.
• Remove the memory module and thermal pad. See "Memory module and shielding" on page 58.
• Remove the heat sink and gaskets. See "Heat sink and gaskets" on page 60.
• Remove the speaker. See "Speaker" on page 61.
• Remove the system board. See "System board" on page 63.
• Remove the optical drive housing. See "Optical drive housing" on page 65.
• Remove the rear cover bump. See "Rear cover bump" on page 70.
• Remove the microphone module. See "Microphone module" on page 71.
Removal steps
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Chapter 6 Hardware removal and installation