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Atari tt030 troubles, garbage screen

PgrAm

Experienced Member
Joined
Sep 28, 2011
Messages
276
Location
Toronto, Canada
I recently opened up my Atari tt030 just to take a peek inside and clean out some dust but after I put it back together It wouldn't boot and I just got garbage on the screen and the floppy disk light would stay on but never finish reading.

IMG_20170608_145937.jpg

I checked all the PSU voltages and they are all correct, I also reseated the socketed PLCC chips and that didn't fix it. Is there maybe a simple cable or jumper that I may have knocked loose? My tt030 is a REV B motherboard from 1991. Anyone have an idea where to look tho fix this problem?
 
Phew. Fixed it!

I had to reseat the "DP8516 Video shift Register". That fixed it. It seems it came loose while I was taking the mainboard out.
 
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