I'm having an issue running my smoothieboard with a GLCD and adapter pcb.
If I supply 5v to the smoothie via USB I get a dim LCD, then turn on my 12v (Vpp) psu I get full brightness and everything displaying as it should.
If however I just turn on my 12v psu I get full brightness but static (stationary) only on the screen. Smoothie is still responsive via USB and telnet just gibberish on the screen
I have a 5v 1a Vreg on the smoothie and 5v (Vusb) is supplied via the USB port (When I plug it into my computer).
I have tried formatting my SD and recopying my config over but no change. This setup used to work until I changed some settings ( Switch modules for fans).
If it helps at all I'm using Notepad++ to edit config and running Windows 8
Any help gratefully received.