I've had this problem and realized my VGA port on the video card was dying. I switched over to DVI and haven't had any problems. Hopefully it's that simple for you.
Well on the rare occasion I got the 430w to power up the Gateway it works flawlessly, but when I turn the PC off it won't boot back up. The HTPC is an old P4 3.ghz with three HDD's and one perephrial, and also powering a x1650 that's power consumption is 50w. I might swing down to Staples and...
Trying to upgrade an old 5404 so I have two half decent computers. From Gateway:
Intel® Pentium® D 915 (Dual Core) 64-bit processor with EM64T Technology
edit: tried replacing the PSU with a 430 Antec PSU and was having a lot of problems. I'm leaning towards the Gateway PSU is a propitiatory...
Trying to get a second computer working. Could I run a 9800gt, 2.8ghz dual core Pentium D with one HDD and one DVD player/burner, plus two case fans?
quick edit: the 9800gts are said to draw roughly 100 watts.