2000 530d - Euro spec

did a search but didn't see a similar issue - bought it in early feb '08, battery died around the 8th, replaced battery. since that time, the check * light has come on repeatedly. mostly for fog lights. had local indie bmw shop look at check lights and replaced bulbs while cleaning ABS sensors (ABS was grabbing at low speeds). drove home friday and no problem with check * light. check license and fog lights are showing up again until this morning. got in car tonite to go home from work and on-board computer/nav monitor is blank. got radio, no problem - could change station - but no display. did US spec 5 series come with on-board nav/tv and if so is there a common problem? prev. owner said his nav would work occasionally but seemed to be failing but no issues with display not showing. sign of a bad chip, failing ecu/cpu (whatever bmw calls it)?? taking it to indie on thurs for new pads/rotors and wheel bearings and will have him look at electrical unless someone has a better idea.

as always, thanks in advance.

kev

O.K. My battery kept going dead on my 2002 530i .before I fixed it my nav screen went dead.radio works, but no screen.I ordered a new nav drive unit.I should have it by Friday I hope it fixes it.Don't order any parts until I get my nav drive unit.Sounds like same problem.
C J

whatcha pay for the nav unit?

I paid $520 for it.It's an mk4.
I should have it 3-11-2008.
I will let you know if it fixes it.try and hold on before buying anything.
C J

just wanted to let you know I got my navigation drive unit today.
It fixed the problem of the black screen.
C J