Lenovo IdeaCentre B345 All-in-One - Manual (Page 66)

Step 24. Reattach the EMI cover, middle cover, optical drive, computer stand and the rear cover.
Replacing the power switch board
Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the 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”.
Step 5. Remove the computer stand. Refer to “Removing the computer stand”.
Step 6. Remove the memory modules. Refer to “Replacing a memory module”.
Step 7. Remove the optical drive. Refer to “Replacing the optical drive”.
Step 8. Remove the middle cover. Refer to “Removing the middle cover”.
Step 9. Remove the EMI cover. Refer to “Removing the EMI cover”.
Step 10. Remove the camera. Refer to “Replacing the camera”.
Step 11. Remove the Bluetooth module. Refer to “Replacing the Bluetooth module”.
Step 12. Detach the Wi-Fi antenna cables from the front bezel.
60 IdeaCentre B345–B545 All-In-OneHardware Maintenance Manual