IBM ThinkPad Z61 Supplementary Manual page 60

Replacing memory
10. Close the computer display, and turn the computer over. Reinstall four
11. Reinstall the battery.
12. Turn the computer over agan, and re-connect the ac adapter and the
To make sure that the SO-DIMM is installed correctly, do as follows:
1. Turn the computer on.
2. While the "To interrupt normal startup, press the blue ThinkVantage
button" message is displayed at the lower-left of the screen, press the
ThinkVantage button. ThinkVantage Rescue and Recovery screen opens.
3. Click Access BIOS. The System Restart Required window is displayed.
4. Click Yes. The computer restarts, and the BIOS Setup Utility screen opens.
The "Installed memory" item shows the total amount of memory installed
in your computer. For example, if your computer has 256 MB of memory
and you install a 256-MB SO-DIMM in it, the quantity shown in "Installed
memory" should be 512 MB.
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ThinkPad Z61 Series Service and Troubleshooting Guide
screws for the palm rest.
cables to the computer.