Hi Manu,

Welome to the forums.

Mine did this with a modded version of the v31 OS, after a long and frustrating set of tests it turned out to be that the navboot file was too large, reduce the size until it's as clsoe to the OEM size as possible and that should fix it.

It could also be as above, a bad backup.

HTH

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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.