Hello, The computer makes to start,and works for two seconds,then cuts out.Sometimes it works for about eight seconds,then cuts out.I have replaced the faulty power supply with a new one.There is only one beep on start up,then it cuts out.The computer has an Asus A7S333 motherboard.
jaquith
Glorious
- Feb 8, 2009
- 14,235
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Welcome to Tom's Forum! 
If your PSU went out it too can take-out anything it's attached to: MOBO, GPU, CPU, etc.
That said, rule-out a short or grounding short. {Lazy-Man's Breadboard}: unscrew all of the MOBO & PCI screws, use 1 stick of RAM and disconnect anything non-essential, dangle the MOBO away from anything conductive {e.g. I/O & standoffs} - support with a towel. Try to start.
BTW - I've seen a shorted USB keyboard/mouse cause a post failure. So if there's a failure then disconnect both and use the power button to start/shut down the PC.
Let us know - Good Luck!
If your PSU went out it too can take-out anything it's attached to: MOBO, GPU, CPU, etc.
That said, rule-out a short or grounding short. {Lazy-Man's Breadboard}: unscrew all of the MOBO & PCI screws, use 1 stick of RAM and disconnect anything non-essential, dangle the MOBO away from anything conductive {e.g. I/O & standoffs} - support with a towel. Try to start.
BTW - I've seen a shorted USB keyboard/mouse cause a post failure. So if there's a failure then disconnect both and use the power button to start/shut down the PC.
Let us know - Good Luck!
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