Help Needed with OBC problem - The Unofficial BMW M5 Messageboard (m5board.com)

rrankin///M5 · 4th November 2009, 20:02

Recently the OBC monitor in my 2000 has stopped working. It displays the menu OBC, Nav, DSP, etc., and I can toggle around the menu, by turning the control knob, but pressing to select does not work, nothing happens. I tried the battery disconnect which didn't work and I lost date/time info. The button on the turn signal works and displays OBC info, (consumption, range, etc.) on the dash so it appears the problem may be with the selector knob. Prior to this failure the selector knob had a bit of a mind of it's own when I was trying to move through the various functions including nav which made using it almost impossible, then complete control failure. Anyone have similar issues or possible solutions? Not interested in investing in a new computer. Thanks

RichardP · 4th November 2009, 20:07

Sounds like the knob has failed, they are optical so it's possible there is some dirt in it.

You would not have to replace the entire Nav system, just the monitor - time to upgrade to a 16:9 monitor?

jclyman · 5th November 2009, 00:03

You can have a problem with the control buttons ... My wife's Mini (with the NAV) was washed at a car wash. They let some kind of cleaning fluid run down the display screen and beyond (you could see the "flow pattern" on the screen, in the proper light). Fu**ed everything up. The good news was ... it fixed itself after 2 days of flaky operation. Other than that, you may need a new button. (There is a spray ... used by electronics folks ... that cleans up the contacts ... but, I'm not sure how you get access to the insides of the button. But, I have used it on home stereo and it does work.)