Commando PCB question

GoneMad

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I am restoring a Commando cab. It was working not long ago, now when I turn ti on, I get a screen full of mostly zero's or just some random images on a light brown background. First off, my voltages are all good. I did find a bad cap and replaced that, and still the same. I'm guessing somewhere there is a bad chip possibly. Is there a half easy way to check for this?
I have a new board coming but it won't be shipped till next week, so I thought it possible I may get this up and running again before then.
 
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