Did you try a different tv? It sounds like either the HDMI input on the tv has gone bad or the HDMI port on the ps3 may have blown. You can also try a different HDMI cable. Early tivo series 3 units used to lose their HDMI connection quite a bit, so it's not uncommon to have a blown HDMI port. if your tv has component connections, you can always use it. It also supports HD video.