Again Check all of the connections on the printer control board first if no problem with bent pins or not properly seated connector need a new printer control board going to be tough to get you have legacy Konica machine
might try this site for parts
Precision Roller Printer Toner Cartridges Parts and Supplies Office...
Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f
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