Satellite U500 - Black edges on external monitor

Hello,
I have problems with HDMI connection to TV.
At FULL HD resolution is in 42" FULL HD TV about 4 cm black edges all around display.
I tried with 3 different HDMI cables, 2 different FULL HD TV and one LCD screen, but everywhere were black edges. Black edges appears when you start computer (at first Toshiba screen and BIOS too).
With same cables and monitors but other laptop is picture without edges.
When I was tryed with HDMI cable (stl.U500) which have got on the other side DVI output (LCD FULL HD screen) was picture without black edges. With normal VGA - VGA cable is FULL HD picture also without edges.
Where could be a problem?
System is Windows 7 64bit with latest ATI display driver and latest BIOS (2.20).
Greetings

Hi Mathew,
Im not a Satellite U500 owner but I assume there must be something wrong with the settings. I never had any problem with the HDMI connection to my external monitor or TV. Its always working fine.
Anyway, what screen resolution you are using on external monitor? You should use the native screen resolution on external monitor. Then you should be able to use fullscreen mode there.
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