I have just done the same thing, I moved my pc downstairs to use my 48" Samsung HD t.v, When I first starting to try and play games it would either crash to desktop (I fixed this by deleting and editing certain config files depending on each game) or when I done this they then started flickering untill I managed to get back to my desktop ..
For example, to get BF2 to work (playing the new AIX mod just now) I had to add a few commands to the actual shortcut to enable widescreen and make it the proper resolution...
Check this link for exact details on certain games..
http://www.widescreengamingforum.com....php/Main_Page
I am actualy going to town today, to buy a dvi to hdmi cable for improved qaulity.
Before you switch over to different monitors/t.v outputs, check the instructions on the tv and the current monitor and find a resolution that is supported by both of them BEFORE switching over as this will cause problems as I found out.
I have an ATI Radeon X1800.
I hope this helps
