Hi, all! Can someone please advise on this? I have an older Dell, the XPS Dimension Gen 4, running Intel Pentium 4 (I know, I know, it's a dinosaur..) at 3.4 ghz. For everything that I do with it, it's just fine I starrted to have this problem. When powering up, the power supply fans run up, the video card fan run up, but the machine will not boot up. The fans will run at high speed for a few seconds, then the 'puter will shut off. Few seconds later it will try starting again, and the process will repeat. Cannnot boot up. Does anybody have any ideas on what's causing it? If it can be repaired? Thank you so much in advance!!!