missile command pcb help

nitrocow

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i have two missile commands the both are in need of help

missile command one: the horizontal picture scrolls left to right really fast i have messed with the monitor but didn't fix anything.

missile command two: the track ball is not responsive. tried rebuilding it still didn't fix anything put it in missile command one works fine.


both problems see to be board related any help will be greatly appreciated
 
For trackball try replacing the mc14584 @ C9 that commonly goes bad.

The first sounds like a sync issue you can troubleshoot depending on what equipment you have or just try replacing chips at

N11 and/or A9
(Assuming you already verified you monitor is ok with the 2nd board with no issues)
 
If it does not help and you want them fixed, I fix MCs for a reasonable price
 
For trackball try replacing the mc14584 @ C9 that commonly goes bad.

The first sounds like a sync issue you can troubleshoot depending on what equipment you have or just try replacing chips at

N11 and/or A9
(Assuming you already verified you monitor is ok with the 2nd board with no issues)

On the last one I had with the trackball not working both mc14584's were bad. One @ C9 and one @ C11
 
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