Replacing the system board. Lenovo E73z, 10Bl

7. Remove the screw that secures the integrated camera to the front bezel to remove the integrated camera from the computer.

Figure 39. Removing the integrated camera

8. To reinstall the integrated camera, position the new integrated camera and align the screw holes in the new integrated camera with those in the front bezel.

9. Install the screw to secure the new integrated camera to the front bezel.

10. Route the new integrated camera cable, and then connect the integrated camera cable to the system

board. See “Locating parts on the system board” on page 69.

11. Reinstall the system board shield. See “Removing and reinstalling the system board shield” on page 83.

12. Go to “Completing the parts replacement” on page 108.

Replacing the system board

Attention: Do not open your computer or attempt any repair before reading and understanding the

“Important safety information” on page 1

This section provides instructions on how to replace the system board.

To replace the system board, do the following:

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. Place a soft, clean towel or cloth on the desk or other flat surface. Hold the sides of your computer and gently lay it down so that the screen is against the surface and the cover is facing up.

3. Remove the computer cover. See “Removing the computer cover” on page 75.

4. Remove the system board shield. See “Removing and reinstalling the system board shield” on page 83.

5. Locate the system board in the computer. See “Locating major FRUs and CRUs” on page 66.

6. Remove the heat sink assembly. See “Replacing the heat sink assembly” on page 90.

7. Remove the microprocessor. See “Replacing the microprocessor” on page 91.

Chapter 9 .

Replacing FRUs

101

8. Remove the memory modules. See “Installing or replacing a memory module” on page 97.

9. Remove the battery. See “Replacing the battery” on page 95.

10. Remove the rear I/O assembly to gain access to the system board. See “Replacing the rear I/O assembly” on page 84.

11. Note the locations of all cable connections on the system board and disconnect all cables. See

“Locating parts on the system board” on page 69.

12. Remove the six screws that secure the system board to the main bracket. Carefully lift the system board out of the chassis.

Figure 40. Removing the six screws that secure the system board to the main bracket

13. Place the new system board into the chassis and align the screw holes with those in the chassis.

14. Reinstall the six screws that secure the system board to the main bracket.

15. Reinstall the rear I/O assembly. See “Replacing the rear I/O assembly” on page 84.

16. Reinstall the battery. See “Replacing the battery” on page 95.

17. Reinstall the memory modules. See “Installing or replacing a memory module” on page 97.

18. Reinstall the microprocessor. See “Replacing the microprocessor” on page 91.

19. Reinstall the heat sink assembly. See “Replacing the heat sink assembly” on page 90.

20. Reinstall the system board shield. See “Removing and reinstalling the system board shield” on page 83.

21. Reconnect all cables that were disconnected from the system board. See “Locating parts on the system board” on page 69.

22. Go to “Completing the parts replacement” on page 108.

The failing system board must be returned with a microprocessor socket cover to protect the pins during shipping and handling.

102 ThinkCentre E73z Hardware Maintenance Manual