Lenovo ThinkCentre A70z 1184 User Manual page 31

7. Look for a buildup of dirt on the plastic rollers 3 inside the ball cage. This
buildup usually appears as a stripe running across the middle of the rollers.
8. If the rollers are dirty, clean them by using a cotton swab soaked in isopropyl
(rubbing) alcohol. Turn the rollers with your finger and continue swabbing
them until all the dirt is removed. Be sure the rollers are still centered in their
channels after you clean them.
9. Remove any fibers from the swab that might be remaining on the rollers.
10. Reinstall the ball and the retainer ring. Twist the retainer ring to the locked
position.
11. Reconnect the mouse cable to the computer.
12. Turn your computer back on.
Chapter 6. Troubleshooting and diagnostics
23