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Computer powers on then off

  • Homebuilt
  • Computer
  • Power
  • Systems
Last response: in Systems
September 25, 2009 4:12:39 AM

At first my computer started to power on for a few seconds then power off, then power on for good and boot into windows, I could play games and everything. then it started powering on then off for good. I opened the case and powered it on and all the fans were running and then it powered off about 3 seconds later. I think it is a bad PSU but I have no way of knowing, If anyone knows what it can be for sure, or a best guess, that would help alot thanks.

More about : computer powers

September 29, 2009 7:57:16 PM

I went through the list of possible problems and I dont think any are the problem. My computer one day when I turned it on shut down then powered on again for good. It progressively got worse untill It would only power on for a few seconds then power off. So I RMA'd the power supply. Because I think it wasn't supplying power efficently. When I get a new powersupply and put it in the computer and if the problem persists, what do you think I should do. Any thoughts would be most helpfull.
Related resources
September 30, 2009 1:08:36 AM

Niklas_13 said:
read this try the steps then post back if you still have problems.

I looked at the link and I don't think the problem is caused by any of them. I RMA'd the powersupply and I should be getting a new on soon. But if the problem persists what do you think the problem is. My computer would turn on then off then on and boot into windows, and I could play games and email and everything, then the computer would only power on for a few seconds then power off for good, I hope it is just a bad powersupply. Thanks for your imput on this matter.
September 30, 2009 1:16:28 AM

Sounds like it is the power supply. Also, you could be underpowering the computer, but if that was the case it wouldn't get progressively worse. If you have a spare power supply u can try and power it that way to see if it will work.
a c 122 B Homebuilt system
September 30, 2009 5:54:41 PM

If the problem persists, please post specs of the system, including those of any changed parts such as the original PSU.