Boss DE-200 Power Issue

Hello all. I have a rack mount Roland DE-200 that has one issue. Everything works fine except every so often the power seems to reset. Almost like a reset in the CPU. This causes the sound to stop for approximately 5 to 10 seconds, then it comes back on. I’ve checked the connection to the power cord in the back and there are no issues there. Does this issue sound familiar to anyone? Anything I should try to fix it? I have basic equipment to diagnose problems. DMM and oscilloscope. Plenty of soldering experience.

Thanks!