Replacing The Touch Control Board - Lenovo 10102/4773 Maintenance Manual

Step 9. Disconnect the two cables from the converter, and then remove the two screws that secure the
converter board to the chassis.
Step 10. Lift up the converter board to remove it.
Step 11. To install the new converter board:
a. Line up the holes on the new converter board with the mounting holes on the chassis and
secure it with the two screws.
b. Connect the two cables to the new converter board.
Step 12. Reattach the middle cover, optical drive, stand holder, foot cover and stand base.

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.
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 touch control board:
Note: The following instructions are for C440 touch models only.
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 stand base. Refer to "Removing the stand base".
Step 5. Remove the foot cover. Refer to "Removing the foot cover".
Step 6. Remove the optical drive. Refer to "Replacing the optical drive".
Step 7. Remove the stand holder. Refer to "Removing the stand holder".
Step 8. Remove the middle cover. Refer to "Removing the middle cover".
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Chapter 8 Replacing hardware
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