HD Readon 3200 HDMI error/problem

Hi guys, I have this problem with a laptop HD Readon 3200 graphic card (Gateway M-2414u). Every time i plug in the HDMI to a Vizio VX32L tv, my laptop goes crazy. I go to amd vision center to enable the tv and it says unsupported, but the computer sometimes goes black and it dosen't display anything and the tv says "NO SIGNAL". Even if i remove the hdmi and restart, i still have no video on the laptop. I have to plug a external monitor to see what i'm doing (because the laptop screen is black), the video displays upside down on the external screen. I go to amd vision and fix the upside down problem and fix the view on my laptop screen, but every time i restart i does it again, i have no clue what's wrong! And i don't understand why i have a hdmi port if i can't use it. If someone can help me i would really appreciate it! Thanks

Thanks Dwarf! I'll try it soon because I'm not at my bf's house but as soon as i try it i will post the results :)

Ok, i went to my boyf's house a few days ago and i connected the hdmi and tried to connect by the manual, but no luck! The PS3 connects fine to the hdmi but not my computer, i have no clue and i looked up info about hdmi versions v1.1, v1.2 and v.1.3 my pc says v1.3 so it's supposed to give video but nothing, the tv accepts the vga cable but no hdmi i'm running out of hope! Someone please help!! PS. should i try a different tv? if so, i bought a Toshiba 46'' led tv, still haven't tried hdmi on this one. Thanks!!

Ok, time passed and nothing happened. The HDMI is loose and i need to get it fixed so i think i will mark it as solved Thanks!