Hi Jim and welcome to the site, I’m Louie. Sorry you had to wait awhile but I’ll do my best to help.
Initially, have you tried unplugging for an extended period of time? ...and then plugging back in but into a different outlet?
No, not a different outlet. Not sure why this would matter.
It actually would serve as a test; if the first outlet is stable/good and the act of transferring location to plug into a different oulet might "jar" the JVC back into action.
Offhand, I really am suspecting an internal hardware issue and the above are the only easy user doable tries.
Not unless you are considering a DIY (do-it-yourself) repair approach? If yes, do you have access to and familiar with a multi-meter (and even perhaps a soldering iron)?
Will try a different outlet. Yes I have a multi-meter and a soldering iron.
Great on the DIY!
And would look forward to an update when able.
Tried two different outlets in two rooms. Same result.
I understand and this would confirm the internal hardware issue.
With the unit unplugged, open to expose the inside circuitry.
Please post back with clear pictures of the circuit board. of particular interest would be where the AC power cord is connected to.
And another for the whole board please.
Please check the capacitors of the power supply board. Visually, for any blistering or swollen top and electrically, for the output voltages. Though not clearly shown, there would be a connector from this power supply board that would be feeding the other/main board.