Replacing The Power Supply - Lenovo 90H9 Hardware Maintenance Manual

Step 10. To install a new fan:
a. Place the new fan with into the bracket, then secure the fan with the
two locking pins.
b. Align the two locking pins at the bottom of the bracket with mounting
holes on the chassis, then snap the fan and bracket into position.
c. Connect the new fan cable to the connector on the motherboard.
Step 11. Reattach the front bezel and the computer covers.

Replacing the Power supply

Note: For this procedure, it helps to lay the computer flat.
To replace the Power supply:
Step 1. Remove any media (disks, CDs, DVDs, or memory cards) 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 "Left and right view" and "Rear view" for help
with locating the various connectors.
Step 4. Remove the computer cover. Refer to "Removing the computer cover".
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Lenovo Legion Y720T Hardware Maintenance Manual
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