Sticky brown gunk smeared all over the underside of a PC Engine Duo system PCB — Could it be that infamous electrolytic fluid from leaking caps, or something more harmless? : r/consolerepair
Goodman PCBAG123S Ignition Control Board Furnace | HVACDirect.com
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GAA26800NW3 | Unitec Parts
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Generac 0E9668/0E96680SRV 3.9L/3.0L Controller PCB For Liquid Cooled – Gentek Power Generac Parts