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I picked up an untested red tent in September that came with a VS PCB Loaded with SMB and Excitebike.

Both monitors just show white. I swapped out the CPU's with known working ones and no change.

Other PCB's run fine in the cab.

I would lean towards bad ROM's but would think at least one side would show correctly. Seems odd both ROM sets failed.

I know that the SMB kit had some weird things with it. It had to be in a particular side if populated, dummy CPU, etc

I hope to move the Excitebike over to a spare VS PCB tomorrow to see if that brings about any change, but figured I would post here to get a head start on the trouble shooting.

Any thoughts and suggestions.
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