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well, did you try reseating the video card? it is a very simple procedure on the 800,8100,8200,and4100 series inspirons. bascially, you just remove the keyboard, remove the screen and upper case, undo the ribbon cable between the vid card and the screen, and then take the unit out. put it back in and reassemble in reverse. takes about 5 minutes. they even have instructions on the website. all you need are some assorted screw drivers and a 14 gauge piece of wire for popping some pins out. i doubt that the hardware is defective. it is probably either a software conflict or a bad connection, imo (probably software since the picture works until you actually get into windows. have you looked at the refresh rate? the drivers will sometimes allow refresh rates that the LCD won't support), but since you know so much you can do whatever you want. including sending it to a company that may or may not fix your system in a timely manner.