Your MAC mouse scroll ball is not scrolling correctly, whether it be down as in my case or up or around in general.
Action (Multiple Choice):
A) Buy a new mouse.
B) Clean the little bugger.
C) Only use the track-pad (Laptop only option)
D) Slam the mouse around and hope to dislodge the dirt. Usually resulting in only Option A as the choice.
This Instructable is for those of you would like to clean, mod, or otherwise see how the thing works without destroying your MAC mouse, hopefully. It's broken anyway, so what do you have to lose.
Contrary to some research and references that I have read online, a dremel is unnecessary. I used the dremel during my repair process to carve out the Apple symbol on top of the mouse.
Best of luck.
An Exacto knife or sharp knife from your silverware drawer.
A small tipped Phillips screwdriver.
A small tipped Standard screwdriver.
A multimeter if you fancy making sure the 5v power connection is still working properly.
A small amount of quick dry glue or super glue.
Patience, patience, patience.
Step 1: Tools and Completed Disassembly
The disassembled mouse is also shown for reference.
Step 2: The Hardest Part - Teflon Ring and Plastic Ring
With an Excto knife, gently pry the edges up of the Teflon Ring surrounding the main base of the mouse. This is kind of tricky because very small plstic columns hold the ring in position around the entire base of the mouse.
The pictures illustrate how small they are, so just go slow and the teflon ring will come out intact. If columns break, then super glue is an alternative when putting the teflon ring back on the base of the mouse.
The hardest part is removing the plastic ring around edge of the mouse body. Glue is strategically placed around the plastic ring.
However, at each of the buttons, there is no glue. Use the small flathead screwdriver to gently pry your way around the edge of the plastic ring. Wedge a little under the ring and gently lift a bit all the way around. Take it slow and it will not break. If it breaks, then super glue will be needed to put it back together.
You will notice that the buttons on the sides of the mouse are pulled out a bit. That's because you can use the small flathead screwdriver to pop them out a little bit and gain access to the unglued edges in order to take off the plastic ring on the main body of the mouse.
Step 3: Opening the Mouse - Be Careful of the Flat Cables and Side Buttons
The Side Buttons have two arms that sit underneath the PCB and you will see hinged from the base. Carefully remove them.
Two flat cables run from the mouse ball enclosure and another on the top of the mouse. Use the small flathead to disconnect the flat cable from the clip on the PCB.
Once disconnected, the mouse can be fully opened.
On the top of the mouse is the housing of the mouse ball.
On the bottom, the PCB hides the USB cable underneath and is connected by the connection on top of the PCB.
Step 4: Disassembly of the PCB
The PCB is held together by three screws.
Take notice of how the side buttons of the mouse attach underneath the PCB.
The USB cable is held onto the bottom with a couple of strategically placed pieces of tape.
The Optics of the laser will fall out when you take the PCB off. Try not to lose it, scratch it, and DO NOT try to clean it. Just set it aside for when you put it back together.
Step 5: Disassembly of the Mouse Enclosure
Note: The mouse ball enclosure screws are longer than the PCB screws. When you put the mouse back together, the shorter screws go into the bottom to hold the PCB board.
The mouse ball enclosure and scroll wheels are held into place by a delicate plastic white covering. Take special notice of the orientation of this part. It only fits on ONE way.
The four scroll wheels are oriented around the mouse ball. They are held in place by small ferrite wheels on the plastic posts. The wheels are pictured in the order that can be seen when looking at the small grey covered plastic magnets in the enclosure.
These pieces are super small, so be careful not to lose them.
To clean the posts, gently remove the grit, grime, and gunk with the edge of the Exacto knife or your finger nail, whatever works.
Step 6: Congratulations - Now Put It Back Together
As I shared at the beginning, I used a dremel to carve out the Apple Logo. I like it and was going to piggy back an LED onto the 5v USB cable, though I thought I'd do that some other day.
To put the mouse back together. Just follow the steps you took to take the mouse apart in reverse.
You may not have had to take off the PCB or cable, so your job if half over.
Just be careful with the mouse buttons and flat cable installations. The flat cables can take a bit of fanagling.
The Plactic Ring around the base of the mouse should be the last piece reinstalled on the mouse. Use a couple of dabs of super glue or quick-dry glue and you're done.