Thanks for your response.
I've tried what you saiid, to set the Apple TV to 720p with my monitor but when i connect the TV "no signal" appears again.
that I don't anderstand is the fact that it worked fine until I have this problem of HDMI cable that I replaced.
and the 2 TV hdmi inputs works well also because I can connect my "Cable Box" and my game box on both inputs it's ok.
I've tried to find something in the parameters menu of my TV (SAMSUNG) but I didn't find anything to set or test the hdmi inputs;
the only problem I had is the HDMI connector cable TV side was torn off when I tried to remove it and the AppleTVwas connected, I first thought of a hdmi output shortcircuit but AppleTV works fine on my computer screen, so it's not a hdmi output problem!
I don't know what to do .......
Thanks for your response,
I've tried with another cable, nothing .....
I've made a full restoration of the Apple TV with the newest microprogramm ..... nothing happends ....
I'll try with another TV maybe ........ I'll keep U informed.
have a good WE.