ok... i got a treamcast vga box and a gateway ev700 monitor.
i've tried 70+ games on vga monitor and only had few that had problems. dance revolution/club version, snk fighters, snow surfers..
heres what i do :-
1. leave everything connected, dc to vga box to monitor.
2. switch treamcast box to eithier jap/usa setting.
3. if self boot u insert disk, turn on monitor and dc, if non-self boot insert boot disk, turn on dc.. wait for 40 secs, switch disks, wait 5/10 secs then turn on monitor.
4. enjoy your game in lovely vga
)
hope this helps ya
byeeee