Lenovo ThinkCentre M83 Hardware Maintenance Manual page 291

1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Remove the computer cover. See "Removing the computer cover" on page 237.
3. Remove the hard disk drive assembly. See "Installing or removing the hard disk drive assembly" on
page 251.
4. Remove all memory modules that are currently installed. See "Installing or replacing a memory module"
on page 262.
5. Remove the system fan. See "Replacing the system fan" on page 276.
6. Remove the thermal module. See "Replacing the thermal module" on page 278.
7. Remove the Wi-Fi card module if your computer has one. See "Replacing the Wi-Fi card module" on
page 266.
8. Record the cable routing and cable connections and then disconnect all cables from the system board.
9. Remove the five screws that secure the system board by following the sequence shown in the following
illustration.
Figure 285. Removing the five screws to secure the system board
.
Chapter 10 Replacing FRUs (machine types: 10A4, 10A5, 10AA, 10AB, 10DF, 10DG, 10DH, 10DJ, 10E8, 10E9, 10EA, and 10EB)
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