I bought a 510 used, and it was working fine when I received it. I turned it off to do some maintenance and now, the printer does not boot.

The LCD screen stays at High Definition 3D Printing, and I can’t get a signal on a VGA monitor, so I don’t know if there is an error or not.

I have replaced the power supplies, the pci control board, and the BIOS battery, nothing has helped. I don’t know if there is something else I need to replace, or if it has become a lost cause. I have not replaced the CPU or motherboard, but I was hoping to avoid that. I did initial replacements thinking maybe something shorted out, but nothing has worked. Any suggestions or help would be greatly appreciated.