Sanyo CPT3240 no image troubleshooting

[ostlar]

I just got this Sanyo 14", model CTP3240, and it has a major issue.




Turned it on and it lit up to a proper snow picture, everything seemed fine, however after barely touching the potentiometer for the horizontal size (?) marked [<-->] seen on the second picture, the flyback lost power and image turned off. Adjusting it seemed to cause the flyback to turn on and off like it had a bad connection. After turning the pots for a while, it didn't want to kick on the flyback at all. Only some screaming noise from the speaker as if it was an LW radio out of tune.

I opened it up, dusted it out and started looking for cracked solder joints. Noticed that the front potentiometers were not soldered onto the board, but in a plastic cage with wires running from the pots to the board. The connections seemed fine, so no cracked solder joints to blame here.

Cleaned out the pots with contact cleaner, lots of turning, and dried them out with compressed air. Did this twice. Now it stopped making any noise, just a faint 50hz hum.



The big resistor on the image above get insanely hot, so I haven't dared to try the TV on for more than a couple of seconds while testing. I can smell it, and even after being unplugged for a couple of minutes, the resistor is too hot to touch.

Could an IC or a transistor suddenly die due to the crusty horizontal size potentiometer? Where would I start to diagnose this without the schematic?

My first thought is to disassemble the potentiometers and measure them, but I'm not sure if I know what resistance they should be.

I would really like to resurrect this set.