Yamaha p250 weird issue

1

I m an happy user of a P250 yamaha…
once moved carefullyto another room … strange and weird stuff happens:
Once turned on… after en X time there s something like a delay in the keabord response…
it happens that voulume rise… than… No sound, no response from keybord… nothing… like freeze…
the only solution is off and on again…
but… it happens again… after… 2 minutes or more… but it happens.

Tried a factory reset… nothing…
tried a diagnostic scan… everything ok.

2

That sounds like a temperature related bad solder joint, or faulty chip.

A tech will usually use freeze spray or a hot air heat gun to go around the circuit board while tapping on components trying to cause a part to expand enough to trigger the fault.

This is a frustrating thing to diagnose. Try to write down exactly how to reproduce the fault to help the tech.