Blank Nav screen
 

I took my 2002 to BMW to diagnose my blank Nav screen. My radio and cassette work. They diagosed my screen unit as bad ( wanted $2400 on a $2000 new option to fix). I walked out spending another $1500 on a variety of items that I didn't intend to ($575 for a thermostat). I bought a guaranteed functioning unit on my own (eBay) for $800 and had it installed (another $150).....same blank screen. They told me they thought it was the navigation unit in the trunk. The red light blinks on my Mk 3 unit. What do you think? Thanks

Do you have a TV option ?, if yes then it can be a TV module that is broken, othervise it is the MK3 or some cables not connecting well

Blank Nav screen
 

No TV option. Thanks

try checking connectons and cleaning them,

Most likely Nav drive is bad.

Just sent you PM.

I had a similar problem with my MKIII. My Navigation screen would go black, periodically reboot, and my Navteq navigation CD would constantly eject itself even though it was flawless.

I would recommend trying to DOWNgrade your Nav software (to v21.1 which brings you to 3-1/62) and see if that fixes the problem. If it does, you can always use any of the later versions of the Nav software to bring you up to version 3-1/63). It worked for me.

Good luck!