I found if you are clutzy and work with poor lighting you can plug the cable in the printer wrong. I should've known better.
24V to ground or 5V or something fried the carrier board for the keypad and the SD reader/connector. The PCB traces look okay. I recognize I may have other problems too but I'm going to take a shot and fix the carrier board.
I turned the printer on without the carrier board plugged in and heard the familiar start up tones, I think I may be in luck.
My problem is that I cannot read the melted IC to determine a relacement part number. I read the current printers are no longer open source hardware and I cannot find a parts list or schematic.
Would anyone be able to look at a good board or documentation and tell me the part number on the IC circled in the picture?
I looked at older schematics and it may be a 8 bit shift register but I can't find a part matching the PCB footprint so I'm out of luck.
Please help if you can!!