Monitor is tasting the rainbow.
 

Now by all accounts this seems to be a video card problem. But I've changed my video card/tried another monitor on my pc/tried my monitor on another PC to test this and the problem only appears on mine.

I have a Samsung SyncMaster 215TW 21 inch wide screen LCD Monitor. The problem is about 3 inches down from the top of the screen I have 2 lines running across from one side to the other that look like some rainbowy pixel distortion that doesnt go away no matter what I do.

The reason why I thought it was a video card problem was because I change the resolution the distortion moves around and changes sizes to match the resolution change. Like when I start up windows and its running the bios, the distortion is at the bottom of the screen and its HUGE.
Also when I switch the channels on my monitor from analog(computer channel) to AV(component cable channel) the distortion only shows up in the analog channel. So I have no idea. Maybe is the wires or the connectors?

Any help would be appreciated.

I believe I had a similar but much worse problem before, the video card was pretty much dead aside from the fact it "worked", replacement solved the problem.
I suppose you can try to make sure the card is in all the way, or tighten the cable connection, but it's most likely your video card needs to go.

I switched my video card with another and I tried my monitor on another computer that wasnt having any video problems and the distorion remained.

If you put your monitor on a different computer with a different video card, does it still have the problem?

If you put a different monitor on your computer with your current video card does it still have the same problem?

It's a little unclear what your answer is to each one.

Sorry.
1. Yes
2. No

Then there's something wrong with your monitor.

My dad has a LCD TV that has an entire of column of pixels that display as a load of stuck pink pixels. I think there's probably some switch inside the electronics hardware that gets stuck permanently on some setting and doesn't respond to other signals, so it just always shows the same thing.

If your computer has a DVI output, you could try hooking up the monitor using that instead of VGA. Your post makes it sound like it might be a problem with just the input that you're using.