I have a radeon 9800 and I have know problem using my TV as the default monitor. The BIOS and Boot skin roll vertically but hey, we cant have everything. Did you setup your primary display to tv through the ati control panel. If so make sure it is set to ntsc format, mine defaulted to pal. I know its a no brainer but make sure you are on the correct input channel, a lot of tvs have seperate input channels for s video. Hope this was of some help.