Computers power flickers when turned on
Dell XPS 420
2.4ghz quad core
awhile ago my pc started to shut itself down and smell like it was on fire. I found that my psu's fan had stopped working. I then threw a box fan next to the case with the side panel off and it has been fine until today. Now when I first push the power button for like 10 seconds the power flickers then it eventually turns on. Do I need to pull the psu? Any of you know what kind of psu will fit into a xps 420. I called dell and they won't tell me anything until i pay them 40 dollars first.
Please help! Thanks!