| Problem | Possible Causes | Remedies |
| Moving the mouse does not produce corresponding movement of the on-screen cursor | Ball is coated with dirt | Extract the ball by opening the cover underneath the mouse and wash in warm water with soap; dry and replace |
| The movement of the onscreen cursor is erratic | The mouse cable is knotted/twisted | Straighten the cable |
| The mouse is not responding at all to any movement | The mouse ball may be stuck | Clean the mouse ball |
| The mouse cable may be broken | Replace the cable |
Troubleshooting the Mouse