Quote Originally Posted by sniffle View Post
For some reason im only getting backlight on the display. With no text even after i recompiled and uploaded the firmware and i have to figure out why the board isnt powering up without the usb connected as after calibration and config i plan to mostly use this stand alone with the sd card and abl.
Does the graphic display on the 12-inch connect to RAMBO through two ribbon cables like on RAMPS? If so, make sure you haven't swapped them. And if you had a RAMPS setup, I'd say the power issue sounds like a 12V connection to RAMPS is missing. The 5V electronics will power from USB when ever it is there, otherwise get power from a regulator off the 12V input to the board. RAMBO should be the same...