hi again folks, working on a dell dimension 3100 that wont boot, it has diagnostics on the front of the case, 1234... well i've downloaded the manual and read about these flashing lights, but this pattern is diffrent, problem is i have no hardware in my house that matches this thing at the moment, so no testing tools i guess, i get a black screen, powers supply fan turns and a yellow light near the cmos battery is lit, so Iknow i HAVE POWER, any idea as to what this might be, tryed to reset cmos jumper and this may be a video card issue but the people who i got it from says they had some writing on the screen when they try to boot it and the writing was some sort of cleaning or something, well thanksas always and hope I made some since in this lol