Have a MX-3501N that wasn't printing - checked everything - Updated Firmware - Cleared Print Controller - Tried taking another MX-3501N Firmware and replacing it in the problem machine.
After changing out the Firmware & HardDrive I came into a deeper issue - No Screen at all. I'm figuring that now I need to repair or replace the PCU Power Board and replacing the firmware on the MFP PWB.
Any suggestions?
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