Graphics Card malfunctioning

I'm at college/university right now and as such don't have access to a TV at all. And another question, as the image displays perfectly when in safe mode or when the driver is disabled, could it still be a port problem?

Would the graphics card really fail after only 4 months? I haven't done anything intensive with it, and definitely not within the last 24 hours before the problem started.

It certainly could fail that quickly and how hard you are working it would only be an issue if overheating were a problem. It could just be a defective card.

One last thing to try, uninstall all ATI software, then unplug card power and remove the card from your machine. Reinstall the card, plug in power and reboot. See what happens. Then if all is well, install the latest ATI 4850 driver for your card from the AMD website. Then see what happens again.

Also, you said your laptop worked with the monitor, did this occur using the same cable as the desktop?

I'll try that as soon as possible, thanks. My laptop worked perfectly with the same cable the desktop is not working with.

I have yet to perform the reinstalling and reseating but I wanted to ask whether or not it could be a PSU problem? While searching for similar problems on the internet someone mentioned that the PSU may not be providing continuous power, possibly correct or not?

Yes that could be a issue as well. Do you have access to another power supply to try it?

So I tried the reinstalling and reseating and that doesn't seem to have solved the problem.

I do have some further information though:

I changed the windows theme to Windows Classic, and now, with the graphics card driver enabled I am able to access the desktop and perform some basic functions. When I went to device properties (of the Radeon HD4850) it said "This device is working properly." Is that at all accurate, or should I take it with a grain of salt?

Additionally, with the graphics card enabled I am able to browse my documents, change settings and open basic programs among other things. As soon as I open anything remotely graphics intensive, a large .bmp or any video the screen turns jaggedy before turning black. Everything else is still running though, as I am can hear the sound of the video playing, and I am able to pause and rewind said video. Does this point to a faulty graphics card?

I managed to get CCC open with windows classic theme enabled. What should I do now?

EDIT:

Temperatures are around 32-34 celsius (90-93 F), ATI overdrive is enabled. Activity is constantly 0% but occasionaly goes to 3-4% for a second or two, I haven't tried anything intensive in fear of crashing.