Bally Alpha S9000 upper screen flicker/changes tint

[stlscott]

I have a Bally Alpha 9000 Quick Hits.  I've tried different cables, plugged and unplugged all cables at the MPU and the monitor, pulled out the MPU and pushed it in securely - seems tight (all while powered off of course), and still get the occasional flicker.... seems to happen early in the process, meaning in the first 10-20min the machine is on.. then it seems to go away... almost like a cold solder or something...

[dailey]

I had a similar issue with my S9000. Occasional monitor flickers that drove me nuts. Sometimes the colors looked faded. It turned out to be the VGA cable connection to the front of the MPU. I could flex the cable and produce the flicker. I was going to replace the cable, but reseating it solved the problem and I haven't seen a flicker since.

Your cause may differ, but it looks like you're checking all of the obvious things.

[stlscott]

I had a similar issue with my S9000. Occasional monitor flickers that drove me nuts. Sometimes the colors looked faded. It turned out to be the VGA cable connection to the front of the MPU. I could flex the cable and produce the flicker. I was going to replace the cable, but reseating it solved the problem and I haven't seen a flicker since.

Your cause may differ, but it looks like you're checking all of the obvious things.

Thanks for the info, maybe I will try some ectronic contact cleaner on the VGA connections.  As an I.T. I have seen VGA connections do that for years, so it makes sense... reseating didn't resolve it but maybe this cleaner will.

[rickhunter]

The caps on your A/D board might be going bad.  Recapping the A/D board often solves flickering and the no-input problem.