K4900 Help

nutballchamp

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I recapped my Bubbles k4900 a month ago and worked great until last night. Now the top of the monitor is freaking out. I checked the B+ and it's 128vdc. Not sure what else to do or check. Any help appreciated. Thanks.


 
Bad sync connection? This chassis is well-known for many cold solder joints so look it over closely under a good light.
 
You definitely have a sync issue as Ken has said, but most likely you have a bad video connector in the wiring harness if it is original. Wiggle the video connector on the board end and the monitor end and see if your picture clears up.

Certainly wouldn't hurt to reflow the video headers also as Ken has said.
 
Yep, the H sync pin was bad on the video connector. I re-pinned all the others while I was in there. Working great now. Thanks!
 
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