ptidwell4917

When left on for a very long print (about 30 hours) I came back to find the print finished but the whole unit wont turn on. The lights inside the print board and the display won't turn on. There is a very faint clicking noise when the power switch is turned on, but nothing else happens. I've replaced the power supply the ultimainboard, and now the display circuit board and OLED screen. Can anyone tell what's wrong, and if they've had a similar issue?