To whom it may concern,
The display PCB's have changed in time but it's the same operating system. It could be either a bad display or a bad PCB inside. If it's within the 2 year warranty your best bet would be to send it in for warranty repair. You can always send an email to email@example.com to set you up with a RMA to send it in.
If it's not under warranty anymore and if you have another working unit with the same color display, you can always start by trying to swap out the display PCB from a working unit to see if it rectifies the issue. If does you can either order the part online from our parts.elationlighting.com parts website. Or you can contact Elation customer support at 323.213.42593 between 8AM - 4:30PM PST and order it over the phone. If you have any further questions please contact Elation customer support at firstname.lastname@example.org