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Replacing The Touch Control Board - Lenovo IdeaCentre B340 Maintenance Manual

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Step 10. Detach the speaker system from the rubber screws.
Step 11. To install the new speaker system:
a.
Secure the new speaker system to the chassis with the rubber screws.
b.
Connect the new speaker cable to motherboard.
Step 12. Reattach the EMI cover, middle cover, optical drive, computer stand and the rear cover.

Replacing the touch control board

Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.
To replace the touch control 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 optical drive. Refer to "Replacing the optical drive".
Step 7.
Remove the middle cover. Refer to "Removing the middle cover".
Step 8.
Remove the EMI cover. Refer to "Removing the EMI cover".
Step 9.
Disconnect the touch cables from the touch control board.
Step 10. Remove the 2 screws that secure the touch control board to the chassis.
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IdeaCentre B340Hardware Maintenance Manual

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