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So everything was working fine today. I decided to plug in a different PCB (pandora) into my dedicated cabinet.

Turned it on, heard pop pop pop and smelled some smoke. Screen is black and only shows a single line in the middle. Switched back to original PCB and same thing black single line in the middle that is showing what's suppose to be on the screen but collapsed to a single line. Tried moving pots, but nothing.

Anyone know what this can be? Am I screwed? Is there a reason this would happen from just switching PCBs?

Edit: Additional info: Chassis is a K7000
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