Step 12. To install the power switch board:
a.
Align the new power switch board with the corresponding slot, and then push the power
switch board until it locks into position.
b.
Connect the cable to the new power switch board.
Step 13. Reattach the middle cover, optical drive, hard disk drive, graphic card, rear covers and stand base.
Replacing the rear I/O module
Note:
Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.
Note:
It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo
recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches
or other damage.
To replace the rear I/O module
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 stand base. Refer to Removing the stand base.
Step 5.
Remove the left and right rear covers. Refer to Removing the rear covers.
Step 6.
Remove the graphic card. Refer to Replacing the graphic card.
Step 7.
Remove the hard disk drive. Refer to Replacing the hard disk drive.
Step 8.
Remove the optical drive. Refer to Replacing the optical drive.
Step 9.
Remove the middle cover. Refer to Removing the middle cover.
Step 10. Remove the stand holder. Refer to Removing the stand holder.
.
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