Working, then not, now 7805 is hot ;(

Hi guys

I bought a kit from alibaba (geetech aluminum i3 prusa) and it was working fine (could do manual control over repetier host, homing, bed/extruder heating). The only thing that was missing was the extruder fan. This was not plugged in yet because i was missing a cable.

Now i get the cable, plug it in, and try to run the printer again. Now nothing works. The LCD barely lights up for a few secs then turns off again. I cant connect to the printer over usb either. And the 7805 is getting VEEEERRY hot. As in hot enough to burn myself.


Im assuming the 7805 is burned through, and this has to do with some USB 5V/7805 disturbances.

Would you recommend simply soldering out the 7805? Could this solve my problems?

Cheers



EDIT: Soldered out the 7805, still no connection to the printer....Considering just going for a RAMPS board.