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Discussion Starter · #1 · (Edited)
Hey everyone, just been building a new system for a friend of mine, has the following specs:
  • Abit SG-80 Motherboard
  • Pentium 4 3.0GHz processor
  • 1GB Ram
  • 128 MB graphics card
  • 80 GB HDD
  • Liteon DVD-RW
I have checked all the power cables are in the right sockets, and plugged in the right way around, however when i turn on the pc, it powers up to just past the BIOS screen, then shuts down immediately.
What could possibly be causing this?
Also, I have tried jumping the power switch on the motherboard with a screwdriver and still nothing
 

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Brand and model of the PSU?
Have you tried the out-of case procedure?
1) Remove EVERYTHING from the case
2) Set the motherboard on a non conductive surface. The motherboard box is perfect for this. DO NOT PLACE THE MOTHERBOARD ON THE STATIC BAG! It can actually conduct electricity!
3) Install the CPU and heat sink.
4) Install 1 stick of RAM.
5) Install the video card and attach the power supply connection(s) to the card if your card needs it.
6) Connect the monitor to the video card.
7) Connect the power supply to the motherboard with both the 24pin main ATX Power connection and the separate 4 or 8 pin power connection.
8) Connect power to the power supply.
9) Do NOT connect ANYTHING else. Make sure you have the power connector on the CPU fan connected.
10) Use a small screwdriver to momentarily short the power switch connector on the motherboard. Consult your motherboard manual to find which two pins connect to your case's power switch. Then touch both pins with a screwdriver to complete the circuit and boot the system.
 

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Discussion Starter · #3 ·
Yeah tried an out of case procedure and still nothing happened, powered up, then shut down immediately after reaching BIOS screen, the PSU is an OMNI 400W Switching PSU
 

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Did you use Artic Silver between the heatsink and CPU? Are you certain the CPU/Heatsink is tight on the board. (when cool, ground yourself and see if you can move it any, it should be very tight) Do you have the +12 molex from the POWER SUPPLY plugged in to the motherboard and the heatsink fan connected to the motherboard.

Do you have a decent power supply you can try in there, yours is very low quality. Please list the brand name and type of video card you have in there.
 

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Discussion Starter · #7 ·
Yes, I used arctic silver between the heatsink and cpu, I cannot move the heatsink, extremely tight, Yes there is a +12V molex connecter plugged into the motherboard, and the heatsink fan is connected to the motherboard. The video card is an nVidia Geforce 9600 GT
 
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