Fixing a jittery composite display?

[jedimatt42]

My TI is connected to composite in on a 40" lcd. So when it jitters, it actually moves quite a bit.

 

Also when I've connected it to a composite to HDMI converter ( the cheap eBay kind ) I only get a black and white display... I originally blamed the cheap converter, but I wonder.

 

Somewhere I saw a recipe for fixing the black and white output by replacing the crystal for the video.

 

Does anyone have experiences fixing the jitters, or know if that is a precursor to more severe failure?

[+Ksarul]

Some newer monitors don't like the composite signals produced by vintage computer hardware. The machines played a bit loosely with the composite standard back then, as the old-school hardware was pretty tolerant of minor variances in the input signal. There is a lot of message traffic out there on the subject.

 

On the jitters, the monitor might be losing the sync signal once in a while. That may be the monitor not reading the computer output well, or it may be the computer. If you have an old-school CRT, I'd plug into that and see if the jitters continue or if they go away. . .that way you know the problem isn't something going bad in the computer (assuming it goes away).

[Shift838]

I posted the Video repair in my last newsletter:

 

ftp://ftp.whtech.com/Users/Chris_Schneider/Newsletters/Shift838_News_Letter_V1N8.pdf

Edited September 18, 2015 by Cschneider

[RickyDean]

If you haven't done so already, check your system video connector for looseness and you cable for possible problems. These have also been known to cause problems.

[jedimatt42]

Thanks! this all gives me some good direction before I get drastic... although I do check code-hack-create every day