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I attempted to install a new PSU for my PC. When I turn on the PC it turns on for 1 second then turns off and repeats this

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March 15, 2013 4:01:11 PM

I was going to upgrade my PC with a better GPU and PSU. I installed the PSU and plugged in all the cables (4-pin on mobo, 24-pin on mobo, SATA on HDD and disk drive). When I go to press the power button the PC will turn on and off quickly and repeatedly. The fans will all spin up then shut off and the case lights will also flash on and off. I have read through many posts with similar issues but have gotten no where fast. Help is very much appreciated.
a b 4 Gaming
a c 227 à CPUs
a c 196 V Motherboard
a c 88 Î Nvidia
March 15, 2013 4:12:02 PM

Here is a great checklist.

http://www.tomshardware.com/forum/261145-31-perform-ste...

At the very least unplug everything and start over making sure all your connections are good. You could have received a DOA power supply. It happens even with the best brands. What make and model is it?
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March 15, 2013 4:13:43 PM

STBROWN said:
I was going to upgrade my PC with a better GPU and PSU. I installed the PSU and plugged in all the cables (4-pin on mobo, 24-pin on mobo, SATA on HDD and disk drive). When I go to press the power button the PC will turn on and off quickly and repeatedly. The fans will all spin up then shut off and the case lights will also flash on and off. I have read through many posts with similar issues but have gotten no where fast. Help is very much appreciated.

please post your complete system specs - including any peripherals connected to your pc and your psu's brand and wattage. my rough estimation is that your psu can't supply enough juice to your system. but still, post your specs so that the community could pinpoint your problem and help you better.
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March 16, 2013 8:00:19 AM

Motherboard-Angelica2
CPU- 6-core AMD FX-6120
GPU- AMD HD 7450 (upgrade will be EVGA GTX 660)
PSU- corsair CX750 builder
10GB of DDR3
CD-ROM drive
Card reader
Stock case fans
case is HP pavilion h8-1234
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March 16, 2013 8:19:11 AM

I got my PC with all the stock components from HP, everything worked fine. I wanted to upgrade my GPU from an AMD 7450 up to an EVGA GTX 660. To do I would have to also upgrade my PSU as the stock PSU from HP didn't have the 6-pin PCIE plug. The PSU I purchased was a corsair CX750 builder series with 750w. When I installed the new PSU I plugged in all of the appropriate cables(24-pin,4-pin,SATA) and tested the PSU with my old graphics card, when I did this the PC turn on then off quickly and repeatedly until I flipped the switch on the PSU. This is where I'm stuck at.
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a b 4 Gaming
a c 227 à CPUs
a c 196 V Motherboard
a c 88 Î Nvidia
March 16, 2013 11:08:19 AM

Have you done as I suggested and unplugged everything and started over? Also try your old power supply again. If everything works you know your new one is dead.
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April 2, 2013 6:13:46 PM

Just want to track this thread, i hope you don't mind. Doing exact same thing with my HP later
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a b 4 Gaming
a c 227 à CPUs
a c 196 V Motherboard
a c 88 Î Nvidia
April 2, 2013 6:18:28 PM

Fullmetal_Alchemist said:
Just want to track this thread, i hope you don't mind. Doing exact same thing with my HP later


Good luck!
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a b 4 Gaming
a c 227 à CPUs
a c 196 V Motherboard
a c 88 Î Nvidia
April 2, 2013 6:20:42 PM

I did not have the problem. I tried to help.

Edit: That was a quick edit lol.
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April 2, 2013 6:22:43 PM

10600736,0,218893 said:
I did not have the problem. I tried to help.

my bad I misread the earlier posts

Edit: (new here to, still figuring out forums stuff)
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a b 4 Gaming
a c 227 à CPUs
a c 196 V Motherboard
a c 88 Î Nvidia
April 2, 2013 6:28:15 PM

Fullmetal_Alchemist said:
10600736,0,218893 said:
I did not have the problem. I tried to help.

my bad I misread the earlier posts

Edit: (new here to, still figuring out forums stuff)
said:


No problem at all. You would get more help by starting a new thread though. Feel free to PM me if you get stuck and I will be glad to help.
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June 27, 2013 4:16:41 PM

I don't know If you still follow this thread, but did it work out for you? Did you get the PSU to work?
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a b 4 Gaming
a c 227 à CPUs
a c 196 V Motherboard
a c 88 Î Nvidia
June 27, 2013 6:33:00 PM

Fullmetal_Alchemist said:
I don't know If you still follow this thread, but did it work out for you? Did you get the PSU to work?


The OP never picked a best answer or replied again so I doubt he is still tracking.
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!