The battery was unhooked for about a week while at the body shop. Picked it up last thursday and the buttons all light up but the main screen does nothing. He called a local dealer and he said it has to be turned on by a tech 2, which I think sounds rediculous. I checked every single fuse, I did find the hvac mini fuse inside the car was missing, but the dic/hvac was in tact and still good. Everything else in the car works perfectly as it should. I even pulled the dic out and took it appart to checka bulb and it's good. Checked all 12v on the harness going to it and there's power where there should be. Kind of lost at this point. I was thinking about going to get another dic from the junkyard but the car only has 8000 on it now. BTW the body shop did a great job repairing the car, just waiting on one more nos part.