Sounds like the image has been corupted somehow, and this has hung the dvd nav drive.

First off, dont panic. The NAV system might seem as if it shot, but its designed to always boot from a NAV OS disk if one is present in the drive. Therefore, try burning the disk again.

Download the v29 zip file again and you will need to make sure it's interpreted as a Mode2 iso file. The .mdf file is a text description of what goes inside the .mds.

Use imgburn to burn a new image (using the .mds file) and burn at 1x speed, on a quality CD or DVD.

Simply insert your newly burnt disk into the drive and the NAV computer should boot from it ok.

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Sept 03, M3, Silver Grey. Retro-fits: Modded Mk4 DVD Drive, OEM Bluetooth, VR Control, Rainbow Speaker Upgrade, Sony SOT Amp, HK Sub, CCFL, Intravee II, NightMode.