Scroll wheel doesn't work!
There is a design bug in the plastic shaft that connect through the optical encoder. If the wheel just spins and you can't feel "clicks" as it turns, it's very likely that the plastic shaft has worn down enough that it's not actually turning the encoder. The encoder also provides that clicking action; it's a single component. To fix it, take the mouse apart: 4 Phillips #00 screws located under the two black plastic adhesive feet (two under each screw) plus 3 screws (2 #0 Phillips, 1 T6 Torx) located inside the battery cover under the label on the edge with the Microsoft holographic seal. Just peel that edge of the label back to expose the three screws. Torx T6 goes in the middle.
After all 7 screws are removed, the cover removes easily. Locate the mouse wheel and notice the silver optical encoder component through which the mouse wheel shaft enters from the center. If you remove the wheel (gently), you'll see a hexagonal pattern in the shaft. This normally fits the encoder tightly, but wears out over time and use. To repair, take the wheel out and add a drop of superglue to the shaft to that the drop of liquid glue coats only the hexagonal tip all the way around. Do not allow the glue to get on any other part of the shaft or wheel. You don't want to use the glue to actually adhere it to the encoder; you only want to use the glue to add a small amount of thickness to the shaft. After about 30 seconds, use a clean paper towel and gently wick away the remainder and excess glue from the tip of the shaft. This should leave a very thin coat of superglue on the shaft. Allow the shaft to dry completely or use accelerator to speed the curing process. Once dry, attempt to re-insert the wheel into the optical encoder. It should fit tighter now, and still turn freely. If it's too tight, use a sharp knife and GENTLY scrape-off some of the glue on the tip of the gray plastic shaft.
Once you have the wheel shaft reinstalled and you got the clicking action back, you could stop here and re-assemble the mouse. Or, to make the fix last longer, take a toothpick and an extremely small drop of superglue and add it to the outside-facing center of the optical encoder where the shaft is visible. Place the micro drop on the gray shaft, then very carefully work the liquid to the point where it makes contact with ONLY the black collar of the optical encoder. This should glue the gray shaft to the black collar. If you go too far and glue the black collar to the silver casing of the encoder, you may permanently damage the encoder, so be damn careful when applying the glue. After it's dry, the wheel should still turn, click and function normally. Reassemble the mouse and you're done. I've successfully repaired 6 Arc Mice using this method. I used Loctite Low-Bloom Superglue and 712 Accelerator. Good luck.
Sep 09, 2009 |
Microsoft ARC Mouse