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Computer wont turn on or boot

\015 Ok...something wierd is happening with my computeri few days back i started building my own computer with a:ECS elitegroup GF7100PVT-M3 motherboarda Pentium 4 521 LGA775 800 MHz Processor and Foxconn Fan/heatsinka nVidia GeForce 8400 GS video card2 Kingston 1024MB PC5400 DDR2 667MHz Memory modulesa 120 GB Seagate Hard Driveand a Power Up ATX Mid-T case with a 450w PSUSometimes the computer wont turn on at all, or sometimes you have to physically lift the fan (put pressure on it so it goes up maybe 1 mm) so it will work. Sometimes the PSU works fine, but sometimes im not so sure about if its working or not. I think i blew out the CPU_FAN connector on the motherboard so right now im using the SYS_FAN connector. If you want the fan to start, you have to lift the wire that goes to SYS_FAN a bit so the fan can turn on. Lately, nothings been working at all...\015

Answers :

What size power supply are you using, if its under 400 watts it may just be under powered. Large video cards 512mb and over take a lot of power. Try removing the video card and see if you can get the pc to power up, hopefully you have on board video.
\015\012How did you blow the cpu_fan connector, did you short it out? I would first supect the power supply is under rated, second a blown power supply, or mother board.
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