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PC will not power on with p4 connector in

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Anonymous
a b ) Power supply
a b V Motherboard
December 15, 2009 6:43:13 AM

Hello Everyone,

I have a really nice issue. My PC has been working perfectly for about 9 months now. Two days ago, I left home for 2 hours came back and my PC was turned off. I went to turn it on and no power at all. I checked everything. The power to the PC is fine. I had not hardware issues recently and I have not changed anything new. I have a Intel quad core processor, with a compatible gigabyte MSI motherboard. The motherboard has an p1 24 pin connector and P4 connector for the extra processor power.

I found out when I have the p1 connector in, the PC will power on, all drives, cd roms and fans are one. If I plug in the p4 connector, you have hear the PC try to turn on and the fans try to turn but then no power. This does not even happen in one second it is really quick.

Does anyone have an ideas what is this cause. To me it seems like the power supply is fine because it can supply power to the PC with the p1 connector. It is 450 watts and it has been working for nine months fine.

Do you think the motherboard or processor is OK. Could the processor notice a heating issue that quick and shut off? Also while I was out there was no power surge at home. So nothing happened to the PC.

Please help?

More about : power connector

a b ) Power supply
a b V Motherboard
December 15, 2009 11:40:16 AM

My guess would be the PSU. I think that when you put a load on the 12V rails, its failing. In other words its no longer capable of delivering its rated amps on the 12V rails.
a c 144 ) Power supply
a c 156 V Motherboard
December 15, 2009 12:38:45 PM

Quote:

Also while I was out there was no power surge at home. So nothing happened to the PC.

How do you know (especially if you were out)? :) 

Most likely problem source - PSU. Possibly the motherboard. Unlikely to be the CPU.

Our standard checklist and troubleshooting thread:
http://www.tomshardware.com/forum/261145-31-read-postin...
Related resources
Anonymous
a b ) Power supply
a b V Motherboard
December 15, 2009 12:43:27 PM

Well all the clocks in the house were not reset! That is what I was going on. haha. :p 

I am trying another Power supply tonight. The we will know.
Anonymous
a b ) Power supply
a b V Motherboard
December 15, 2009 6:47:45 PM

Well, The Power Supply has been replaced but I still have the same issue. Need help
Anonymous
a b ) Power supply
a b V Motherboard
December 15, 2009 7:53:37 PM

Specs: MSI Motherboard model MS-7388 K9A2-CF Series
AMD Quad core CPU 2.2 ghz AM2+ socket
4 GB RAM
Nvidea geforce 9400 GT
2 sata harddrives
2 dvd burners
Power supply = TRUST PW-5210 420 watts

I hope this helps
May 23, 2012 5:12:47 PM

Quote:
Specs: MSI Motherboard model MS-7388 K9A2-CF Series
AMD Quad core CPU 2.2 ghz AM2+ socket
4 GB RAM
Nvidea geforce 9400 GT
2 sata harddrives
2 dvd burners
Power supply = TRUST PW-5210 420 watts

I hope this helps



I am having the exact same problem with my hp m9040n after trying to upgrade power supply. Did you ever get this resolved?
August 14, 2012 1:25:47 AM

Aerostar said:
I am having the exact same problem with my hp m9040n after trying to upgrade power supply. Did you ever get this resolved?


Does the computer turn on to the Setup screen, the screen where it says like, F10 for setup?

The solution may as said above, a Power Supply Unit decided to go. If you added new hardware, graphics card, hard drive, cd drive, unplug the new hardware piece and try starting the computer back up.

If you have a graphics card, and there is also onboard graphics, try unplugging the graphics card and then try using the onboard graphics. If it works, it should be the Power Supply Unit.

Also, I just remembered this, try unplugging, the keyboard? I think it should be in a USB port. You might have to get a PS/2 keyboard in order for it to work.

PS/2 port looks like this(where the smiley face is, it should be, ":" "P", no space, the site thinks I am trying to make a smiley -_-):
 s-2-ports.jpg" rel="nofollow" target="_blank">http://en.wikipedia.org/wiki/File:p s-2-ports.jpg

!