I need help finding out how to fix my PSR-36. Not sure what happened but I when I opened it I was able to see some physical damage. It may be the water went in or something else happened but cushion was damaged and there seems to be the remaining of melted cushion on the surface which was in contact with the cushion. See picture.The keys which are not working are exactly in the area of damaged cushion - see right side above the speaker
Can the cushion be replaced - and how - it seems to be glued. Would that resolve the issue?
What is the replacement part name/number/price?
How much would cost the whole board where the cushion is glued to? What is the name and price of that part?
I want to fix it but only if there is inexpensive way.