MO28UO mouse

This MO28UO is an IBM-branded mouse from early 2000s I suppose. Looking around it may have been sold as Lenovo-branded too. Certainly it would fit the Thinkpad colour theme...

Although I like the slightly old-school weight and speed of the mouse, I noted the wheel is prone to mis-interpret the direction.

I opened the mouse and took some images.

The scroll wheel is not based on an optical coupler, so the wheel doesn't have holes. The axle had accumulated some dirt and hairs, which I removed.

I didn't expect it to matter much in this case.

The wheel part is simply lying on top of the wheel button switch, which might already be a source of some problems.

After cleaning, the wheel might have improved slightly but I suspect the mechanism is simply not that good to begin with, or it has become worn out.

Although a tactile/audible response from the wheel is a good thing, this one's a bit too noisy for my tastes.

So I guess I'll abandon this mouse...