I have an F90BT that, after you see the initial boot screen (in my case, a custom picture) all I get are a Black Screen and none of the buttons are working. The headunit itself is working, as I can cycle thru my sources via the remote and change channels on the radio/XM stations. But the sceen and the buttons are dead.
The truck is a 2008 Silverado LTZ. It had the BOSE option. I am using the PAC units to interface with the remote and OnStar.
I have noticed that a lot of other people are having issues similar to mine, but not exactly the same.
The only thing I can think to do