Microsoft Bluetooth Notebook Mouse 5000 Central wheel button switch Fix

With a little flat screwdriver like iFixit 2.0 gently remove the laser plastic icon; it's attached with bi-ahdesive tape

Keep the plastic cover in a safe and dust free place

Unscrew the torx6 that is under the cover you just removed

You'll need a T6 bit like the iFixit one I used

This is a tricky one, you can easily now lift the lid from where I pointed out

After this you have to "unclick" the front of the lid, gently lifting from down to up, nothing will break

As you see in the next image the lid has a "clip" that clips on the base

You have to carefully unclick both left and right the plastic lid with buttons, acting with your nails under the lid

It's easy to insert your nails starting from the button side to the left in this image, and then shifting to the right

You'll clearly hear the "click" when the tab loose: simply do it on the other side, and raise the whole thing up

You can see the two tabs of the buttons in the second picture of this step

Unscrew the four black J1 screws showed in the pic

You'll need a J1 bit like the iFixi one I used here

The cover will now remove without any effort

No effort to remove both side, just raise them up vertically

No nees to remember the position, there's only one way to put them back

Unscrew the three J1 black screws showed in the pic

Gently lift up the circuit board

You have to be careful reinserting: both the four battery connectors, and the multi plug should go in the right places: nothing difficult!

Unclick the plastic in the four point showed up

It's easy, once unclicked the tabs stay put, no need to hassle

Gently lify up and put aside. Reassembling be careful to bring out the light plastic battery guides from down

Unscrew the two black J1 screws shown in the pic

Simply lift up the board, see the second picture

Be careful not to loose the bluetooth discovery button from the main plastic base underneath; it's missing in my second picture

Forgot to snap a picture of the grey button, sorry :-)

Reassemblig be careful and check that the on-off switch showed with circle in the third picture is in the right place before proceeding with reassembly

Lift up the wheel gently from the side shown in the pic

You can use this opportunity to deep clean the wheel, and the area

You can see the central wheel button microswitch in the second pic

In my case just cleaning with blowing air the switch worked! If needed you can now substitute any defective switch

To change the switches with new one you need the appropriate tools, and a discrete ability with soldering!!