Hello folks.
I have one of this "gaming" mouses that A4tech produce.
Anyway will go straight to the cheese. I deleted one program that I had worked whole week and in a moment of depression I throw my fist on the mouse. (Ofcourse after the event I managed to restore the lost code with some 3th part program for data recovery).
Anyway after this not so critical hit in my opinion the mouse totally died. No "mode" LED-s flashing, no usb detection when plugged in to the PC, no red optical led at the optical lens flashing either.
-At first I thought It might be some physical damage (connector, element felt from its pad on the pcb or something). Anyway after checking the whole system everything on the PCB looked fine. Did resoldered few things that looked crappy weaved on the board but with out any result.
On second look i measured the voltage on this Sonix SN8F2253BSG 8 bit MCU. It got its 5v on pin 20 VDDm and its GND but it wasnt working at all. Got the Xout frequency of the outside crystal too. Anyway tomorrow will check the datasheet more deeply, but its seems this MCU died because of mechanical "hit" that was transferred trough the plastic case of the mouse directly to the IC of the controller.
I thought its not so easy to kill this days IC with mechanical stress but It seems nothing is really impossible
Would be great if you share your professional advice's with me
Now I'm kinda happy from this situation because I have something to play with