headunit screen malfunction

2006 hummer 2 Headunit- Kenwood Excelon KVT717DVD Subwoofers- 4 T215D4 15" POWER T2 4-Ohm DVC Subwoofer Component speakers- Boston Acoustics Amplifiers- 2 Rockford Fosgate T30001bd Car Amplifier And 1 T4004 400 Watt 4-Channel Amplifier Lightning Audio Storm S200 battery isolator/regulator, Hope thats everything, Alright heres the problem my battery died, Which ive had happen before but this time i got it running again and now my headunit the screen is white. I can tilt it and lean my head down real close and see the words faintly but nowhere near what its suppose to be. it all plays fine besides the hissing noise that ive mentioned in another thread but i can navigate threw radio stations adjust settings and all but its just extremely difficult to see.   i tried adjusting the contrast and brightness but that didn't help. any ideas or help would be greatly appreciated.

have a warranty? now is the time to use it.

nope

Sorry didnt mean to just say no,,   but no i dont its all out of warranty

This not being able to edit thing is a real bugger, But i fixed it, I found the manual for it online and it showed me where the reset button is which did the trick.