Lenovo C240 All-in-One - Manual (Page 44)

Step 5. Disconnect the data cable from the front indicator board. 1
Step 6. Remove the 2 screws that secure the front indicator board to the rear cover. 2
Step 7. Lift up the front indicator board to remove it.
1
2
Step 8. To install the new front indicator board:
a. Line up the front indicator board with the mounting holes on the rear cover and secure
it with the 2 screws.
b. Connect the data cable to the connector on the motherboard.
Step 9. Reattach the rear cover and secure it with the screws.
Replacing the power switch board
Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the rear cover.
To replace the power switch board:
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 rear cover. Refer to "Removing the rear cover".
38 Lenovo C240/245/255 All-In-One PC Hardware Maintenance Manual