Amarzano
Sounds like you may just have a contrast issue with your stereo display. I messed up mine unknowingly. Contrast can be adjusted by pushing in the volume control on handle bar switch until you get to "Display". But if you can't read your display you will have no indication when your in the "display contrast adjustment" mode. I think you need to press the volume control 4 or 5 times? 1 - bass, 2 - treble, 3 -volume, "4 - display". I think that's the order. I'll check mine and get back to you.
Ride Safe!