Zenith 25EC58 - won't turn on

[Adam]

This is my one in the chrome cabinet, with the SC600.

I decided it was time to pull this one out and use it again, I hadn't turned it on since 2018, it worked fine then...

So I turn it on and get this weird intermittent buzzing in the sound, and I just swapped out the entire sound board, which did fix it. Then, a loose wire from the antenna terminals to the vhf tuner. Then, I adjusted the vert height and size, focus, G2 controls, color convergence, and after some time got a great picture. Now I'm all ready to sit down and watch it, but I noticed the remote (while it worked for channel and volume) wouldn't turn it on/off.

Thinking it was just an alignment issue, I got out a voltmeter and was just going to do the method where you keep clicking button on the remote and try to peak the voltage.

But after I unscrewed the remote receiver board and pulled it out enough to access it, the TV wouldn't turn on at all, not in auto or manual mode. (And I'm pretty sure it's not just a loose wire)

If you look at the pics, you can see where someone messed around with this before - those two components - that optical connector? and switch made of two diodes? seem to have been swapped out for a single component and a resistor.