I use my Radeon 4250 for watching movies on Samsung Hi Def TV on a HDMI port. The video is built onto a Gigabyte MB.
I was watching a movie and the display started flickering green. After a while it ended up with a translucent green overlay over the entire screen. I can still see what is displayed but it has this green screen. I also have a Samsung Syncmaster 933 attached and it displays just fine. Updated the drivers this morning and there is no change.
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I am guessing the it could be an HDMI cable fault, HDMI port fault or TV fault
Check by using other devices and using a different cable
Also try nuking the drivers and completely removing it and then doing the latest install
Wow! Good call.
I pulled out my old dvd player with a HDMI port and started checking cables, ports, etc. Turns out a HDMI cable was bad. How the hell can a stationary cable suddenly go bad? I was thinking video card.