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k, most likely be calling this place "dragon tv repair" monday but i figured maybe itd roust some more brainstorming if i give a few more details:
i played around with stuff today to try to give you an idea of what does and doesnt work.
Tint controll seems to make the black go from greenish black to purpleish black-so that seems ok. Horizontal hold makes the screen flicker (i assume if there was a picture it would be rolling). brightness and contrast react normally....on the blank raster. The tuner audio works fine, no video on VHF or UHF. I dunno...maybe this helps. i opened it up and didnt see anything obvious (bulging caps or bad solder joints). the crt neckboard doesnt have much on it, a few resisters and thats about it. looks like individual color drive is on the main board...side by side red, green, and blue (judging by similar layout of components), but i assume thats all working as i can change the tint of the 'black'.
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