I've connected my PC to my TV via HDMI (I've also tried using DVI). Whatever the resolution (anything from 800 x 600 to 1080p), the image displayed on the TV does not fill the entire screen surface; there's a black border on the edge of the image. This happens in both Vista and Windows 7.
After a bit of searching I came to the conclusion it's got something to do with overscan done by the graphics card (ATI 3200HD). It's definitely not the TV because on my old PC there were no such problems. I've searched for the option in Catalyst Control Center 9.9 but it's not available for the TV; if I connect a normal LCD display, the option is there, but only for the LCD screen. If I choose Configure for my TV, where the overscan option should be, it takes me to the Welcome tab in CCC. How can I make the image fill the entire screen? How can I enable/disable overscan for my TV?
Best Answer
Edit: since quite a lot has changed in the drivers (version 2011.0419 as of this writing) since I initially wrote this post, I decided to update it. The procedure is now drastically simplified:
Initial post: the inability to change underscan/overscan for the TV was actually an issue in Catalyst Control Center, version 9.9. The release notes for the latest version (9.10 from 22.10.2009) state:
I made a short tutorial in case others are interested in changing this setting. To adjust Underscan/Overscan in Catalyst Control Center (version 9):
right click on the Desktop and choose Catalyst(TM) Control Center
from the upper left side corner, left click and choose Desktops & Displays
find the display you want to configure and right click on its icon from the lower part of the window and choose Configure
go to the Scaling Options tab and adjust the slider as you see fit (for me it's 0%, so the image can fit the entire TV screen) and click Apply