i have a AVIC90DVD on a 6400 screen. about 3 weeks ago the navigation stopped working. i could see real time but no longer add new destinations, and if i picked POI the screen would go blank then turn white. so i was hoping the DVD was bad. well i bought a newer DVD on Ebay. not a copy but original. Loaded it and it appeared to update the system. after 2 status bars finished, the system reset. now its saying i have in invalid dish, please replace with correct disk. and my old disk does the same thing. worse than that, the radio and CD and DVD features are all locked out too..

HELP!!!!

Which disk?

40MT i believe, i think i figured it out. the system is looking for a touchscreen and my 6400 is not. im going to try to downgrade the system.

Ya, if you can find a 40R it should work

well the downgrade steps worked, im back to square 1.

so why can i not enter new destination? its grayed out. all i can do is map search

HELP folks...is the DVD bad or my system?

sounds like your oparking brake cable wire (which you should have grounded) has failed if you say the functions are greyed out make sure your ground wire is ok

well the wire was grounded, but its possible that it came ungrounded. but would that cause the screen to go white when i do a POI search?

No

well the wire was grounded, but its possible that it came ungrounded. but would that cause the screen to go white when i do a POI search?

so could there be something mechanically wrong with my system?