UPDATE: the TIP in the comments worked. TV switch. Many Thanks.
Unfortunately, the resolution setting works (tested Win7 / Win8) on the computer does not
somehow he cuts around the outside a 'framework' from.
So: Despite HD resolution of your computer (the port on pure HDMI also arrives)
missing about half the width of the task bar around the outside. Whether the same fault also on
Bluray / DVD player appears not seen unfortunately. Maybe it's my setup.
Anyway so not useful for me.