Noob question - VGA to SCART - Cores no longer displaying

[Birdy1]

I haven't used my MiSTer for a couple of months after working away and tonight i did a complete wipe and reinstall - every core works perfect via HDMI on my LCD TV but hardly any now work with my VGA / SCART into my NEC XM 29 Plus - I just get a blank screen after selecting the core - A couple of months back everything worked fine with VGA

No matter what video settings I've tried I cant get anything to work with VGA any more. Any pointers ?

Been at this all night and its doing my head in

Cheers

[Dercheforp]

Did you set composite_sync=1 in your mister.ini again?

[Birdy1]

Yes I've made sure it is set to 1 - same issue. Weirdly Arcade cores all display fine - Computer and Arcade cores are blank