Not heard of this fault before mate, I'd be tempted to remove the battery and leave it off over night and see if it fully resets everything.

Remember to do the power down on the mk3 first.

BTW is the monitor 4:3 or 16:9 (wide).

P.S welcome to the forums.

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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.