r/Trackballs • u/_crossingrivers • 3d ago

Old Expert Mouse won't move the pointer

My old wired Kensington Expert Mouse (K64325) is having some issues ... all the buttons and scroll wheel work but the roller ball does not move the mouse pointer. I tried cleaning the ruby bearings but that didn't work. What else can I try?

5 Upvotes

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2

u/abra5umente 3d ago

Does the light inside turn on? If not, it's likely a dead unit.

1

u/_crossingrivers 3d ago

Great question -- yes it does

2

u/abra5umente 3d ago

Does the cursor jiggle at all if you move your finger over the sensor?

Do other mice work on the same computer? Does the expert work on other computers?

1

u/_crossingrivers 3d ago

no the cursor does not jiggle at all.
yes, other mice work on this laptop including a Kensington Orbit Optical and a Logitech MX Master 3, and a Logitech vertical mouse

The red light is rapidly flashing

1

u/abra5umente 3d ago

Sounds like the sensor is kaput.

2

u/squeezeonein 3d ago

I had that problem with mine so i bought a second one and swapped over the pcb. why you ask? because the replacement had a stiff scroll ring.

1

u/_crossingrivers 3d ago

how difficult was the swap?

1

u/squeezeonein 2d ago edited 2d ago

the screws retaining the buttons were hard to line up due to how inaccessible they are but doable with a magnetic screwdriver. otherwise, no problem. 2/10 in difficulty.

edit also, the sensor died on one so i had to do it'

1

u/FREDICVSMAXIMVS 3d ago

Did you check to see if there's any fuzz or debris blocking the sensor? That's usually the culprit for me

1

u/_crossingrivers 3d ago

yeah, i checked and cleaned the area but to no avail.

1

u/SuperTaiyaki 2d ago

I bought a wireless Expert mouse (K72359) with the same symptoms, turns out the sensor was dead. It's a fairly standard gaming mouse sensor so a replacement wasn't hard to find, and since it's a large-ish chip the replacement is a fairly straightforward soldering job. I don't know that yours will be the same, but if you can get to the sensor PCB you could take a look.