Strange VGA mod problem....

[spinksy]

Right now I have just finished making the internal VGA mod for my Dreamcast and have just tryed it out, however I'm having a few random problems??

It works ok but sometimes (particularly if you move the switch wires AT ALL - I mean the tinyest knock) and then the screen will go off or flicker. I know the wires are soldered to the switch fine so can't be that.

Also the actual switch I put in dosent really work? If in VGA mode and you flick the switch it stays in VGA mode (should go off shouldnt it as I'm breaking the connection?) I followed this guide and am sure I've done everything correctly as I checked everything about 5 times.

http://www.mmmonkey.co.uk/console/sega/dc-vga.htm

Instead of linking the earths on the VGA switch I considered putting 2 seperate earths but thats all I can think of that may effect it - anyone any ideas?

Thanks

[opethfan]

Obligatory response, but check EVERYTHING. Make sure your monitor's okay, cables, try other ones if you can. Also, look closely for the tiniest problem. A bridged point, a short, exposed board, etc. There are a lot of points in that project, and just one crossed wire could be bad. Make sure of that, then start looking deeper.