Hello, I’m new to this forum but not to DIY keyboard repairs. I have an old PC88 that recently started power cycling while playing. I can be playing along and it just powers off and back on. Almost like something is shorting inside. I took it apart and did a visual inspection, but didn’t see any evidence of arcing or discoloration. Have any of you ever experienced this? Another forum I read suggested bad caps but they looked fine. I appreciate any help/guidance you guys could offer.