Found a couple Sony's troubleshooting one

[Eric H]

OK, found these really cheap so I picked them up to mess around with.

One is a KV1981R, I'm guessing early 80's, Stereo with audio video inputs on the back.
This set is nearly mint, the right speaker grille is bent a little but should pound out OK. It seems to work fine, the CRT is very strong with good gray scale within a few seconds of powering it up, it seems to be low mileage because there's not much dust or crud inside but the outside is yellowish with tobacco stains, it'll clean up but I'll have to strip it bare and wash it.

The second set is a KV1545R, it's one with the "Ball Bearing" control panel, bonus points since I already had the remote for it at home.
It's quite clean with a minor scruff on the top corner.

This one was sitting outside in the junk area for the last three weeks or more, I'm pretty sure it got rained on at least once early on but there doesn't seem to be any rust or ill effects.
I tried it last week when I was at the thrift and it didn't work so I left it, It was dry at that time.
I decided to pick it up this week, it was only $3.98 so little to lose.

It powers on for about a second, the HV hits and the green display comes on briefly, then it shuts down, not entirely though, the relay stays energized until you hit the power button a second time then it clicks off.

It won't power up again (the relay will click but no HV or display) until you unplug it and wait a few seconds, plug it back in and it'll repeat the sequence, seems to be going into auto shutdown?

OK Sony experts, what's wrong with it?

Here are some really lousy pictures.