Receiver will not power on.

I have a Pioneer VSX-1022 receiver. Until recently it has been acting up by at random moments clicks off. After a day or 2 I can plug it back up and after while will randomly power back up. I’ve removed the cover and done a thorough blowing and contact cleaner in every crevice I can find. It was running pretty good after that for a couple weeks then just today quit again. I don’t see any scorch marks like arcing or anything that indicates possible visible circuit issues. I am not sure what else to try. Any advice is helpful.