my pads hitting themself

every spring the same problem, my pads (10,11,6) start to hitting themself in a way i think a machinegun sounds. i´dont know why.
and than when i will cut a sampel my mpc60 get´s a total breakdown and everything i made is lost.

is anybody there who knows if i can fix this problem, or if i can get new pads for my mpc?

I would have a tech look at it, it might be a loose ribbon cable, it might be something a bit more serious. Maybe a power supply problem. It shouldn't cost much to fix, take it to a good tech. Where are you located?

i´m located in germany near colone, do you know a good tech near me?
or any tech where i can send my mpc to?

maybe i will have a problem with the black-sensors under the pads, i mean they are old!