I would get a PSU tester, they are around $20 at circuit city. or you can take another PSU that you know works and use it to test your system components to mke sure they work. if the PSU you use for the test has less wattage than the one that you fried (from what you have said, it sounds like it died) then disconnect all fans except the cpu fan, and all drives. go to bios and make sure the first boot device is the HD then turn the pc off and hook the HD back up an try to boot into windows. please give us your computer specs and any bios codes that popup(write them down word forword, or as close as possible) if you hear any beeps other than the normal POST beeps then write down how many beeps there were and if they were long or short, or a mix. also, it would be extremely helpful if you can find out what brand your bios is.
hope this is of some help to ya
AMD Athlon XP 2500+@ 200x11 - EPoX 8rda3I - Thermaltake 420watt silent PSU - 2x512MB PNY PC3200(DualChannel) - TT HSF - PNY 5900SE, 128MB DDR, 256-bit - - Toshiba SD-R5002: DVD-RW - NEC DVD-RW - 2 Antec 80mm fans - 1 Delta 92mm fan - 1 Antec 120mm fan- 1 TT 120mm fan - Windows XP Pro - WD special edition 80GB 7200 RPM- Seagate 80GB 7200 RPM 8MB cache - Onboard Sound - Onboard Ethernet
ACER Travel Mmate 4000LCi - Intel Pentium M 710 - 15\" XGA TFT - 512MB DDR333 - 40 GB HD - DVD-rom/CD-RW Drive - WLAN 802.11b/g - Winxp Home - Intel Extreme Graphics - Average Battery Life: 4-5 hours - 6.4 lbs