Lenovo 90GS, Hardware Maintenance Manual

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Step 4. Remove the 2 screws that secure the computer cover at the rear of the chassis.
Step 5. To reinstall the computer cover:
a. Line up the computer cover with the chassis, and then slide it back.
b. Secure the computer cover to the chassis with the screws.
Replacing the power supply assemby
Note: For this procedure, it helps to lay the computer flat.
To replace the power supply assembly:
Step 1. Remove any media from the drives, shut down the operating system, and turn off the computer
and all attached devices.
Step 2. Unplug all power cords from electrical outlets.
Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)
cables, and any other cables that are connected to the computer. Refer to Locating connectors,
controls and components to locate the various connectors.
Step 4. Remove the computer cover. Refer to Removing the computer cover.
Chapter 8
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Replacing hardware
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