Thank you both for replying.
First of all this is a straight HDMI connection, no adapters, or splitters, or converters, etc.
The TV is a brand new toshiba. Apple TV works well with the HDMI cable that came with (4-5feet?). This was connected to the HMDI1 port of the tv. However, when I use the 60foot long cable in the same port I get no picture at all. I bought this cable from amazon
I also have a 50foot cable that I bought from staples that is currently connecting the same toshiba TV to a desktop for a different purpose (to have a second, larger screen on the wall). My wife is a dentist and she uses it to show her patients xrays, pictures, etc of their teeth. This connection is using the HDMI port 2. today I used that cable to connect the apple tv and it worked. So the length of the cable can be pretty much ruled, if a 50footer worked why not a 60footer, right?
Before i return the 60foot cable to amazon, i am going to use it to connect the TV to the desktop. If it works I will keep it and just switch their functions (60footer for displaying x-rays, etc, and the 50footer for apple tv). I am not sure whether an HDMI cable not working with apple tv would work to connect an extra screen??? I will let you guys know tomorrow.
Thank you again.
alex