With good disc my navi refuses to load anything. When i update it it jut freezes up. Also my ipod menu button will not work unless i select a new function or song/artist by hitting the artist button on the screen. I am pretty handy at desoldering and repair circut boards. i just need some pointers. Any help is great thanks.

same thing happened to my navigaton a couple days ago after installing a new battery in my car. d3 asks for appropriate disc to recalibrate i guess then goes to a black screen. tried my original west coast dvd and the 2010 one, still nothing works on the navigation. i spent $2000 on this navi in march 2007