So I have a 2005 M3 with an MKIV Navigation unit. It had SW 4-1/42 and I attempted to upgrade it to V32 firmware, which I believe is: SW 4-1/00. Anyways, I followed the exact steps from this link:
http://www.zpost.com/forums/showthread.php?t=69732
I downloaded and burnt the .ISO file onto an HP CD-rom using Imgburn and attempted to update my firmware. My DVD unit screen went blank/black and never returned back to normal. I am sure the install went bad and now the radio, CD, and most functions work normal (i can play the radio and CD), its just that my screen is completely blank. I did a lot of research and I found the following link:
http://www.m3forum.net/m3forum/showthread.php?t=244721
My situation is almost identical to this gentlemens, however, I tried his method wby burning the OS to a DVD and still no luck. I redid the steps exactly with the DVD and nothing happens at all. Any one have any suggestions?