A friends computer has been running slow so (in general) I physically cleaned it out yesterday and today all the sudden problems took a turn for the worse. Turns out when I blew the dust out of the system I didnt remove the video card, so apparently dust lodged deeper into the video card fan and today the video card overheated. The text was spread all over the screen (soon as the screen loads after powering it on) and characters were missing, and colors were distorted / missing alltogether, I tried testing both monitor outputs (the high def port and also the regular dvi output) and both showed the same result. I tried new cables and another monitor, same problem.
I removed the video card and installed another video card I had laying arround and with the new card the color was perfect so problem was definitely the video card.
So I decided to have some fun before I tosses the defective card in the scrap pile, and decided to reflow the nvida chip that was on the card (under the heat sync) with a hot air gun because I had luck several times re flowing chips on some laptops I recently worked on, so I gave it a shot. I reflowed it for about 1 minute then let it cool and plugged it in and hooked up the monitor cable- to my amazement it worked perfectly! I immediately turned the computer off and hooked the cooling fan back up to the video card (after I cleaned it out good from the dust) and I reinstalled it again and ran it for several hours after disabling the power save mode (to keep the monitor running).
After several hours it still works perfect so before I give it back I am looking for a more agressive test rather then just letting it run. Any ideas?