The problem is the motherboard NVIDIA GeForce 6100 / nForce 410 video chip! As a result of heating and cooling of the solder that attaches the video chip to the motherboard, the video chip has separated from the motherboard. This is a very common problem with the Nvidia video chips. The problem is easily repairable and only takes about 20 minutes or so. Tools needed are 1 phillips head screw driver, aluminum foil, thermal grease from Best Buy, and a cheap heat gun from Lowe's or Home Depot ($25)!
There's a number on videos on Youtube you can watch on how to repair the Nvidia video chip and this process. In the center of this particular motherboard, there's a small heat sink. Open the computer case side panel. Unplug all the wires attached to the motherboard. Remove all the wires, plugs and so on from the motherboard. NOTE: Make sure you pay particular attention to the on/off, HDD light, and power light plug locations (take a picture for reference if you have to). Remove all the screws (should be 7 or
holding the motherboard to the computer case. Now remove the motherboard from the computer. Remove the large heat sink for the main processor. Remove the small heat sink exposing the video chip in the center of the mother board. Remove the CMOS battery from the motherboard.
Place the motherboard on a dry surface (not the kitchen counter). Now take the aluminum foil and carefully cover the areas surrounding the video chip to protect them from heat. Take the heat gun on a low setting and carefully heat the video chip for about 25 or 35 seconds (I usually hold the heat gun about 3 to 4 inches away from the chip and move the heat gun back and forth). Be careful not to get too close or too hot otherwise you will melt the solder completely under the video chip. After the heating the video chip, let the board cool on it's own.
After the chip has cooled, remove the aluminum foil, and place a small dab of thermal grease on the video chip. Also, smear thermal grease on top of the main processor before replacing the heat sinks. Re-install the heat sinks and re-install the motherboard into the computer case. Attach all the screws, then plug all the wire back into where they came from.
Computer should work fine now! Good Luck
Here's a video on Youtube from RebootIT on repairing a laptop motherboard with a Nvidia video chip. Same problem, different board! But you can get the main idea of how to heat up the video chip on the motherboard. Also, note in the video, Max uses a butane torch rather than a heat gun. The Torch heats very fast so I would recommend using a cheap heat gun.
http://www.youtube.com/watch?v=bnkQNmKauEc&feature=pyv&ad=5823851286&kw=DV9000
