13” Kortek Green/ Color Issues

Phetishboy

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So I've got a 13 inch cortex monitor that I've been trying to work on for the last couple months. No the monitor works and puts up a good picture, there is no green in the image, only red and blue.

IMG_3277.jpeg

I recapped it, tried swapping the green and blue gain pots and nothing was helping. Well today, I took the chassis off reflowed the solder at the header pins, swapped the blue and green gain pots back, and then made sure there was a solder bridge between the front leg of the green gain pot and the pad next to it. I also removed the header connector from the neck board to the chassis and then replaced it. Somehow, I was able to fix the monitor.

IMG_3416.jpegThe colors were back. Then when I went to put the back door on, I slightly nudged the neck board And was back to this.

IMG_3418.jpeg
What could be causing this problem in the green circuit? The neck board transistor? Is there a resistor in the circuit that could be bad? I just don't get it.
 
Cheap shit wire, bad crimp, burned connector pin...?

I had a stick that wouldn't fire left consistently in my Williams Multi (which somehow made me suck even more at Robotron) and it was a shitty factory crimp in the NEW harness.

Sanity check with meter while wiggling or just shotgun the whole video harness section?
 
Good work, Shawn. Glad you got it fixed finally.
Yeah, that was a bitch for sure. Everything looked intact on the harness, but the wire was so thin that it had been mostly severed when the pin was crimped on. You couldn't tell from the outside as the insulation made it look as thick as every other 20-22 gauge wire. Those deceptive Chinamen. Once I replaced the wire with one from an old Atari harness, the green was back.
 
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