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Well, the fact you get a raster, (light on the screen), proves you have high voltage, vertical and horizontal sweep. A Good sign! Are you getting sound from your VCR when you tune to channel 3 or 4, and have to jiggle the knob? If so that means at least the tuner and I.F stages are passing a signal. The reason you have to wiggle the tuner is, that the tuner needs cleaned, probably quite badly. You need to take the cover off the tuner and spray the contacts with electronic contact cleaner, also known as tuner cleaner. The wafer switches or contacts are badly oxidized and is causing intermittent action of the tuner. Rotate the tuner knob as your spray cleaner on the contacts to distribute the cleaner through out the tuner, as it wipes the contacts. The fact you only have raster is probably because no video signal is getting from the I.F stage, and video detector, through and to the video amplifier tube. Look for tubes in the video circuit, AGC and video output. I was trying to see on your picture what tube number is the video output. Looks like it's a 6AQ5, but not sure. Could also be the setting of the AGC control, so try adjusting that. Yes, it could also be bad caps, and most likely you will have to replace them, mainly the electrolytic cans, and small capacitors, especially if they are the old wax caps, or the bumblebee style. Bumblebee caps are black with color code stripes. Nearly all of those caps are or will become leaky, and may even pop, smoke or blow up. Not very hard to do, if you just take one at a time, and know how to solder. Yes, It's time taking, but worth it. The record changer probably needs to be cleaned, lubed, and the idler wheel replaced. Many times also you have to take apart the small motor, and clean and lube the bearings as well. Honest, it's an easy job, just keep track of how things go together. I usually use a light weight oil for the motor bearings, and also on the spindle bearings. Sometimes you can clean up and restore the rubber idle wheel with a rubber cleaner called vita-drive, or any type of rubber restorer made for that. Also you may have to replace the cartridge and needle, if sound is weak, distorted or needle skips across the record. Just find the part number on the cartridge and Google it. There are still a lot of parts to be found, and I also find a lot of capacitors on e-bay. Must say that is a very nice looking relic, and should be well worth restoring. Looks like it has some awesome size speakers, from what I can see from the grill cloth. Too bad you not near Omaha NE, I'd be glad to help you with it.
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