Problems with a korg piano LP-180

Good evening,
I have a problem with my Korg LP180 piano. After a few minutes of being turned on and working fine, it starts to make a loud, very loud, crackling noise, even if I don’t touch the keys. I tried opening it up and found that the microprocessor is extremely hot. Does anyone know how to fix this issue? I’ve looked for the mainboard but it doesn’t seem to be available for purchase. Help.

The mainboard part # is 510C91553021
for a LP-180
If you are in the US I can order for you for $175. .
and ship it to you.
Email me: