i put a navi disc from an n2 in my radio and now it will not do anything can anyone help

Try to downgrade back to the original software. One of our members here, amp3d, has written a tutorial. Next time be careful and research before trying something that incapacitates a $12oo stereo ;) LOL

http://www.eatmorepork.ca/modules.php?n ... wtopic&t=6