Dreamcast Black Swirl

Hey guys,

I tried a region mod on my dreamcast by tying R512 to +12v.. I fitted a switch so I could turn it off. After doing this mod and turning on the system the dreamcast swirl is now black.... The system won't boot any games and when I do have a game it recognises it and when I go to the CD player it shows me a red colour disc which means the system is somehow stuck in an odd mix of NTSC/PAL or something???

Its originally a PAL system and I really hope I haven't fucked it up otherwise looks like ill be in the market for a new Dreamcast..

Any help anyone could provide in fixing the system would be appreciated.

For now I have removed the mod.