I've done everything I can think of, and did get the sketches to compile, but still have a blue screen but no text. Checked to make sure I have EXP1 going to EXP1 on the RAMPS board. I have not messed with the contrast adjustment. I'd really like to use this controller. Can anyone suggest some troubleshooting steps to try? This is an R1 dated 14 02 purchased in January 2015. Thanks.