Power not working

[losgood]

I think there is something wrong with the power or the control board. I've checked all the power connections multiple times and I looked over the control board to see if anything had burned or if something looked awry but found nothing. I've also re-uploaded the firmware with no success. I'm even more confused now because it was working fine yesterday and now nothing will work (fans, motors, extruder heaters, etc.) except a few lights. Also, when I plug into my computer and connect to Repetier, I can heat the print bed with the power from my computer and the LCD display faintly turns on but that's it. This is just utterly frustrating.

Has anyone ever experienced this before? I'm thinking it might just be a bad control board or bad power box.