I decided as a summer project to build a computer from scratch, just for the heck of it. Obviously there was a problem with this (other wise I wouldn't be asking for help). So here's the situation: when ever I plug in the computer to the wall, the keyboard lights up along with a few spinning fans, but this is just it doing a test I believe. When ever I hit the power button though, all [bleep] breaks loose. The case lights up, all of the fans start spinning, and the monitor goes to sleep(monitor sleeps when plugged in to either video card or onboard VGA(all attempts to get video were made on them both)). The keyboard gives me no response to anything I do either. There are no beeps, there is simply nothing but a whole lot of noise from the fans. And after about 5 seconds it shuts down (as if over heating or not enough power)
11-Bay ATX Window Computer Case w/480W power supply (Alienware design)
CenDyne 2GB DDR2 RAM x2
MSI G31M3-L V2 iG31 Socket 775 mATX motherboard
54Mbps 802.11g Wireless LAN PCI Adapter
Intel Pentium 4 3.0GHz 800MHz 1MB Socket
AOpen GeForce 8500GT 512MB DDR2 PCI
TV-ATSC ATSC/NTSC PCI TV Tuner Capture Card
Samsung SATA HDD 500GB
Seagate 200GB IDE HDD
Sony DVD Drives x2
My attempted solutions: I replaced the power supply because I figured, if it's not enough power or a faulty supply, might as well replace it right? So i replaced the 480w power supply that came with the alienware case with a 600w coolmax. I got no change. Then i realized that my motherboard has no fans plugged directly into it, they all use a molex connector. Perhaps it really does think it's overheating. So i ran into my storage room of old computers (aka my bed room) and grabbed a few compatible fans to plug into the board. I started it up with a fan plugged into sysfan1 and it ran for 10 minutes before i decided it wasn't going to shut down on me. I got all excited that my computer was finally working that i decided "Hey, maybe I fooled it long enough to figure out that the fans are fine." I unplugged the fans and attached the molex fans to the power supply and tried to turn it on. I had it running for a good 3 hours because i got distracted by a Stargate marathon. It was running good without shutting down or getting hot. I hooked it up to the monitor and the tears began to roll. Still no screen. So i decided to go barebones with it and tore it apart. It still wouldn't boot with only 1 2 gig stick of RAM and the CPU running. I then purposely half-assed reattaching the second stick to at least get a sign of life from the POST error messages. Nothing. no sounds. I slowly reattached everything, testing to see if it would boot. It wouldn't. I figured, maybe the RAM just sucks. So i swapped it out with a known working stick and got no change. I cleared the CMOS (with both the battery and the jumper(yes the bloody thing was unplugged when i did this)). I sent back the motherboard thinking it was flatlined. They sent it back saying it was perfectly fine. I checked everything in other systems (except the CPU) and they all worked fine. Then I noticed that the heatsink had no thermal compound on it, so i threw some on and still got nothing. You can tell I was getting desparate. I've tried every aspect of input and output items(ie keyboards, mice, monitors ect.) and got nothing. The only thing left to not be working is the CPU, but i have no way to test it. I cannot find another socket 775 computer to save my life!
Any ideas on what the heck is wrong with this Failienware?