Oppo 93 problem

Started playing a CD tonight in my trusty used Oppo 93 ($40 off Craigslist a few years ago) and noticed the right speaker had about 25% of the volume of the left. It worked great last night. After freaking out thinking it was a speaker or amp problem, I switched to vinyl and everything was fine in both channels. Thankfully not the speakers or amp. Checked all the connections and didn't find anything loose. I'm running all sources including the analog outs of the Oppo through a Jolida Foz SSX into my Rogue Cronus Magnum.

I was flipping some breakers today to switch off power to the garage so I could replace a faulty light receptacle. May have shut off power to the Stereo briefly but not sure.

Any ideas on troubleshooting/fixing this?