Installing or replacing a memory module. Lenovo E73z, 10Bl

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

4. Remove the optical drive. See “Replacing the optical drive” on page 82.

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

6. Remove the two screws that secure the converter board to the main bracket.

Figure 35. Removing two screws that secure the converter board to the main bracket

7. Disconnect the three cables from the converter board.

8. Lift the converter board off the computer.

9. To reinstall the new converter board, connect the three cables to the new converter board. Position the new converter board and align the two screw holes in the new converter board with those in the computer.

10. Install the two screws to secure the new converter board to the main bracket.

11. Reinstall the optical drive. See “Replacing the optical drive” on page 82.

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

Installing or replacing a memory module

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 install or replace a memory module.

Your computer has two memory slots for installing or replacing DDR3 SODIMMs (small outline dual inline memory modules). When installing or replacing a memory module, use 1 GB, 2 GB or 4 GB DDR3 SODIMMs in any combination up to a maximum of 8 GB of system memory.

Chapter 9 .

Replacing FRUs

97

To install or replace a memory module, 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. Locate the memory slots on the system board. See “Locating major FRUs and CRUs” on page 66.

5. Remove the system board shield or open the system board shield window to get access to the battery.

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

6. Remove any parts and disconnect any cables that might prevent your access to the memory slots.

7. Do one of the following:

• If you are replacing a memory module, open the retaining clips and remove the old memory module that is currently installed.

Figure 36. Removing a memory module

• If you are installing a memory module, open the retaining clips of the memory slot into which you want to install the memory module.

98 ThinkCentre E73z Hardware Maintenance Manual