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Student trying to fix PC

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December 16, 2012 6:02:30 PM

Good day to all who grace this thread, I am a student who's PC has decided to break right in the middle of my exam period. I am trying to fix and diagnose it myself any help you guys can offer is great, I am looking to learn from this experience so please link literature or relevant information, thanks!
I have already swung through the checklist posted elsewhere on this website and as far as I can tell I have accounted for what is listed there.

ibibl-lp mobo
24pin atx power
4pin atx cpu power
9 pin connection for reset power button etc

month ago computer started giving out every time I tried to turn it on 5s then it would restart, I eventually fixed this by taking out the mobo battery and then replacing it (same battery) I checked it's voltage and its still giving me 3v as expected.

jump to earlier yesterday, pc is off when i get home and wont respond to the power button despite the fact that it is recieving power from the psu ( I checked the psu with the paperclip test green to black and the fan of the psu starts and such) So this means that I should be able to start the pc from the 9pin that the powerbutton is connected to I go to do this but its not working (admittedly I could have been doing it wrong but I essentially tried a paperclip a knifeblade and a pairof scisors to bridge pins 8 and 7 and start the pc (doesnt work zzz)

So at this point im kind of stuck, I susepect mobo failure since the previous problem was solved via silly manipulation of mobo battery, how should I go about testing the mobo to confirm failure and is there any insight you guys can offer me (My local pc stores are actually jokes/hidden camera shows not knowing anything actually)
Here is some literature about my mobo
ipibl-lb http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en...

Also if anyone knows a procedure for performing the 9 pin short that I can use (to make sure I was doing it right) please let me know.

Thanks in advance guys

More about : student fix

a c 559 V Motherboard
December 16, 2012 6:17:52 PM

Hi, Nice description. What do you study?
Are the CPU and the case fans spinning when starting the board?
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a b V Motherboard
December 16, 2012 6:19:38 PM

what and who makes your PSU and how old is it? I think your PSU has failed. If you push the power button and nthin happens it has most likely failed.

List the other components and make of your PC if you bought it from Best Buy, etc. You can purchase a replacement PSU cheaply.
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December 16, 2012 6:34:53 PM

alexoiu said:
Hi, Nice description. What do you study?
Are the CPU and the case fans spinning when starting the board?

I am a second year chemistry student at my local university, as far as I can tell I have not actually been able to start the board I have not heard a peep out of any of the fans except for the PSU fan when bridging the green-black on the 24 pin
avenseth12 said:
what and who makes your PSU and how old is it? I think your PSU has failed. If you push the power button and nthin happens it has most likely failed.

List the other components and make of your PC if you bought it from Best Buy, etc. You can purchase a replacement PSU cheaply.


My PSU is likely 5-10 years old and the make is HIPRO model= D3057F3R

pc = HP pavillion a6535c
intel core 2 quad Q6600
Nvidia 9500 GS

Am I crazy for believing that my PSU has not failed, since there is a light on the back of my PC that lights up when the PC is plugged in, and the motherboard will not start when the 7 and 8 pin on my 9 pin are shorted on top of the fact that the PSU fan starts when paperclipping green to black.
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a c 559 V Motherboard
December 16, 2012 6:37:32 PM

You can borrow a power supply from a friend or test yours in a different PC.
My guess is that it's a board issue.
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December 16, 2012 6:44:38 PM

alexoiu said:
You can borrow a power supply from a friend or test yours in a different PC.
My guess is that it's a board issue.

Thanks for your response, what kind of board issues should I be looking out for? What specifically can I do to confirm that my mobo has failed.
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Best solution

a c 559 V Motherboard
December 16, 2012 6:49:21 PM

Not much, other than swapping parts and test. It's definitely a power issue, since no fans are spinning, even when shorting the PSU green&black wires. However, the shorting test is not relevant for a power supply, as it might fail under load.
Try connecting a fan or two to the PSU molex and test again with the paperclip.
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December 16, 2012 7:25:17 PM

alexoiu said:

Try connecting a fan or two to the PSU molex and test again with the paperclip.


So I took a look at the fan cables which are usually drawing power from the mobo (connected to pins there) which means that the cabling is female, my problem is is that all the cables running from my PSU are also female and I have no idea how to attach the fan directly to the psu, help appreciated.
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a c 559 V Motherboard
December 16, 2012 7:35:06 PM

The yellow wire is 12V, the black is ground. Use two wires to connect the 12v and the ground pins from the PSU molex to the fan's molex.
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December 16, 2012 7:56:03 PM

I don't understand why you just don't get a new mobo, its super cheap.

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December 16, 2012 8:16:38 PM

bretmh said:
I don't understand why you just don't get a new mobo, its super cheap.

http://www.gaming-tech.net/sig.jpg


Cheaper to solve the problem, I am in the process of wiring the fan to the PSU, will post with updates and potentially pictures.
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a b V Motherboard
December 16, 2012 8:37:31 PM

I still believe your PSU has failed. You have an HP and they install very poor power supplies that will fail. I have had that issue with a PC my wife bought from HP and the PSU died after 8 months and I replaced it and everything was fine.
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December 16, 2012 9:13:14 PM

avenseth12 said:
I still believe your PSU has failed. You have an HP and they install very poor power supplies that will fail. I have had that issue with a PC my wife bought from HP and the PSU died after 8 months and I replaced it and everything was fine.


I want to believe!

a PSU replacement would surely be easier than a board one, I have a multimeter what voltage should I expect to be reading across the 4 pin cpu power atx

Also I finished wiring the cpu fan to the psu and the result is that the fan does not spin.
Here are so pictures just to make sure I did it right.
Wires I used (came from an ethernet cable) http://www.imagebam.com/image/248ec6226255272
The wiring job http://www.imagebam.com/image/ace1e5226255290

In the realm of replacing PSUs do I just need to match the voltage suported by my mobo?
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December 17, 2012 4:41:26 AM

Issue was resolved, replaced the PSU and everything works fine, thanks to everyone who contributed to this thread especially alexiou and avenseth12.
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December 17, 2012 8:18:13 PM

Best answer selected by brutusthebear.
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