I received a modded dreamcast today and it worked fine for a few hours, then after I turned it off and on to change games it started to not function correctly. Under Force VGA it duplicates the screen and displays it twice. It now will only display the screen correctly in "cable detect" mode, but at a lower resolution. All the tests show hearts, no x. I myself did not install the dchdmi but from a reputable modder. Any solutions? Or should I have this checked by a modder to see if any of the solder points were done incorrectly. As I said it functioned fine for a while and then stopped so I am not sure what would have changed.