Connect G4 to Sony Rplcd Through Dvi>hdmi


I'm trying to hookup my single 1.25G G4 to my Sony KDF55WF655 RPLCD via a DVI>HDMI cable. I get the gray start up screen but then it goes black (I think when it detects the res of the monitor) I've tried setting up a couple different resolutions via SwitchResX (TV's actual res, 1280x720, even 800x600) and setting the res to that then hooking up to the TV but that still didn't work. I've thought about just upgrading the video card to one that has an s-video out, but don't want to spend the money on a new card if that isn't going to work either.

Thank you.