Help!

have a 2008 f250 6.4 fx4 with factory nav and radio touch screen, has the factory sub in the rear,

i bought the truck with the nav/radio not working - its black screen but is lit as you can clearly see at night time

i took it in to ford they plugged in and said its pooched so they say

few days later i start my truck in -25 degrees and the nav screen lights right up, does this initilaizing, installation, etc and boom - works perfect, the nav, the radio the cd, everything worked as it should!

i shut the truck off thinking everything is self fixed but next time i get in truck black screen but cd still playing and controls are working but no display, soon after turning truck on and off - nothing worked - just a black screen.

sometimes it tries to initialize and then shuts off but rarely, its usually just a black screen and nothing works.

i was planning on replacing the entire system with an aftermarket but id hate to spend $800 if i dont have too. im hoping its something that someone has also experienced and fixed.

 

Hey did you ever figure out what happened? Or how to fix it? Cause I'm having the same problem. But mine turns on for a couple seconds here and there and then just goes black. No music and nothing on the screen.