Repairing Apple Mighty Mouse Scrollball
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Fixing a dirty scrollball. Symptoms of dirty scrollball are stickiness and not scrolling.
- Author: Alex Jansen
- Time required: 30 minutes to 1 hour
- Difficulty: Difficult
A common problem with the mighty mice is that dirt gets in the scrollball assembly and will make scrolling extremely aggravating. There are other solutions like washing the ball in rubbing alcohol and using that to clean the rollers, but I found it much more effective to attack the problem at the source. I would assume that this guide would loosely work for the USB version though I have not tried.
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Before you continue, turn off the mouse using the slide switch underneath the mouse.
Before disassembling the mouse, first try scrubbing the mouse ball with a toothbrush and isopropyl alcohol. Be sure to get the bristles between the ball and the housing as this will help remove dirt and dust that is clogging the rollers inside.
You can also try blowing into the "ball hole" with a can of compressed air.
Insert spudger between button and outer white ring.
Twist the spudger to separate the ring from the body of the mouse. Work the spudger around the whole mouse until the ring is completely detached.
You must use some force to break the adhesive that holds the ring in place, but try not to crack the plastic ring.
You will have to glue this ring back to the mouse body when reassembling it. Cyanoacrylate adhesive works well.
Remove the four rollers from the black housing with tweezers. They are held in place magnetically.
Clean all parts in isopropyl alcohol, allow them to dry, and reassemble the device.
When reassembling the Assembly, the Rollers are placed back with the back wheel end touching the metal tabs.