Lenovo ThinkCentre E93z Hardware Maintenance Manual page 116

6. Remove the VESA mount bracket. See "Removing and reinstalling the VESA mount bracket" on page 87.
7. Remove the heat sink assembly. See "Replacing the heat sink assembly" on page 98.
8. Remove the microprocessor. See "Replacing the microprocessor" on page 99.
9. Remove the memory modules. See "Installing or replacing a memory module" on page 107.
10. Remove the battery. See "Replacing the battery" on page 104.
11. Remove the GPU fan. See "Replacing the GPU fan" on page 103.
12. Remove the card reader. See "Replacing the card reader" on page 101.
13. Remove the rear I/O assembly to gain access to the system board. See "Replacing the rear I/O
assembly" on page 89.
14. Record all cable connections and cable routing and then disconnect all cables from the system board.
15. Remove the six screws that secure the system board. Carefully lift the system board out of the chassis.
Note: Carefully handle the system board by its edges.
Figure 56. Removing the six screws that secure the system board
16. Place the new system board into the chassis and align the screw holes in the new system board with
those in the chassis.
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ThinkCentre E93z Hardware Maintenance Manual