HDMI setting on TV not working?

So I have a 720p Toshiba from 2006 that has an hdmi port. I have been using it for the past 6 years for the same thing. All I use it for is gaming. I have owned various xbox 360's and I now have a PS3 slim that is a year old. It has always been as simple as plugging the cord into the TV and PS3 and switching to the HDMI input on my TV. I recently took my PS3 to a friend's house and plugged it into their Vizio with their HDMI cord. When I plugged it back in at home, my TV did not pick up any picture or sound on the HDMI setting. I didn't change any of the settings on my ps3 and my tv has had the same settings for the past 6 years. I tried to hook up the old standard av cables and that worked perfectly fine, but I can't stand playing standard def, especially on an hdtv. Every time I switch to hdmi, the screen just goes black. I tried my Sony Vaio pc as well and that didn't work either. Is it time for me to get a new tv, or can anyone help me solve this problem?