I've actually tried the console on two different TVs, with different HDMI cables, with a VGA cable... to no avail.
The PS3 and Wii worked just fine, but not the 360. The only way I managed to get some sound was with the component cable, but the picture was all green and really bad, it looked like an Amstrad screen!
Well, I found a pretty good offer for a new 250 Gb Slim 360, with Forza 3 and Crysis 2. Too bad Crysis 2 is actually a download code, and I already have Forza 3...
If anyone's interested, I'd be happy to swap it for issue 97 of RG (not sure about the number, it was the issue on FF7).