Hypersports Lines On Screen

parkway

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Donor 2016
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Got an untested Hypersports for free. Plugged it into my Track and Field and it works ok except for white lines running horizontally through the screen. I've searched and it looks like a couple of guys are familiar with these boards, but I haven't seen this particular problem discussed. All chips seem to be seated ok; no pins touching each other on the solder side. What else could it be? Is it something simple I'm missing? Thanks.
 
Hmmm.... Check around the 2148s on the bottom board. If you have a ROM issue you generally get vertical lines... This sounds like an issue with the RAM instead.
 
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