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Antec Power supply 480 watts

How can you test the psu outside of the computer box

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At work we have a voltage meter we can hook it up to - or if we suspect its bad we have a spare one we know works that we put in to try.

Posted on Jan 16, 2009

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Faulty power supply or MOtherboard?


Test the Power Supply first.

If you have a multimeter, use the Positive (Red) probe lead to connect to the power wire to be checked.
The Negative (Black) lead connects to ANY ground wire. (ALL Black wires are Ground wires)

Three main voltages are produced by a personal computer Power Supply.
1) Orange insulated wires are 3.3 Volt
2) Red wires are 5 Volt
3) Yellow wires are 12 Volt.
(Again, ANY Black wire is a Ground wire)

Or use an economical power supply tester.
One example,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=5250576&CatId=5471

You are making a connection from the green Soft Power On wire, to any Ground (Black) wire with that jumper wire.

Using an HP Pavilion A1330E desktop computer for an example,
we can see that the main power cable is a 24-pin ATX main power cable.

This is readily shown by looking at the motherboard,

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00496280&tmp_task=prodinfoCategory&lc=en&dlc=en&cc=us&lang=en&product=1829044

Scroll down to the motherboard illustration, and the motherboard photo underneath the illustration.

This is the pin-out for a 24-pin ATX main power cable, and connector,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

The Green wire (Pin 16) is the Soft Power On wire. The other end of the jumper can touch ANY Black ground wire.

1) ALL the lights use less than 1 Watt of power.
2) EACH fan uses 2 to 3 Watts.
3) A typical Processor can use anywhere from 51 to 125 Watts. Depends on what Processor it is.

The three Processor options for the Pavilion A1330E are, (Socket 939 style),

A) AMD Athlon 64 X2 4800+
B) AMD Athlon 64 4000+
C) AMD Sempron 3200+

The Sempron 3200+ can use up to 62 Watts
Athlon 64 X2 4800+, 110 watts, and Athlon 64 4000+ can use up to 89 Watts.

Point?
You have nothing but the motherboard plugged in, and the Power Supply takes a 'nose dive'.
Power LED turns off.

Bad Electrolytic Capacitors in the Power Supply.
Replace power supply.

What causes this?
1) Most computer failure can be attributed to the inside of the computer is dirty, as well as the Power Supply.

When the cooling components of the Power Supply, (Fan, and internal Heatsinks), are clogged, the cooling capacity drops tremendously.

Heat = Wasted Energy

The Power Supply tries to keep up with the call for power, and eventually components inside the Power Supply fail.

A can of compressed air for computers, used on a regular basis as needed could prevent this. (Observe Anti-Static precautions Before placing hands inside computer)

2) Cheap quality power supply.
Saves the computer manufacturer money.

May 22, 2010 | HP Pavilion A1330E Customizable PC...

2 Answers

Optical drives gone after replacing power supply unit


I suspect something was not plugged in correctly. Double check all the IDE cables and power cords, make sure that the slave drive and master drive are set correctly. This is determined by a set of jumpers on the end of the drives. The one set to master should be at the end of the IDE cable.

The other possibilities are that the power supply does not supply enough power for the system (which I doubt unless you have done some serious upgrading to the Video card and/or processor), or else there was some damage done to something on the motherboard via static shock during the PSU switch.

Jan 18, 2010 | Dell Dimension 4600 PC Desktop

2 Answers

I recently decided to try to upgrade my HP Slimline S3500t, 64 bit vista home computer's video card, but as i was researching it I found out that i needed to not only upgrade the video card but through...


Ok. The Power Supply Unit that comes originally with your pc is intended for 270 watts only. Sorry, with that kind of power output, you can not upgrade ypur graphix card. I would advice, keep the card you already bought. Get something around 500 watts. Of course, it has to be connected outside the case (the one you currently have is a special form factor PSU). You can get one for around 50 dollars from most online merchants. Good luck.

Jan 05, 2010 | Computers & Internet

1 Answer

Asus M2N / Antec SP-350


Things to try:

1. Check that the cpu fan is properly connected to the correct port marked CPU FAN.

2. Make sure the power cables are connected correctly to the motherboard.

3. Test the button switch with a multi-tester to make sure that it tests good.

4. Make sure the power switch is connected to the correct pins on the motherboard.

5. With the computer off pop the cr2032 battery out and pop it back in after a few minutes.

6. Test the power supply with either another motherboard or a power supply tester.

7. Test the motherboard with another power supply.

8. If all else fails replace the motherboard I have had a bad one from time to time even out of the box, and if you have a spare cpu you may want to test with that also. Cpu's hardly ever go bad I think I have had two go bad ever, not counting power surges and storm damage.

Sep 10, 2009 | ASUS Computers & Internet

1 Answer

My HP 705W will not come on


You may have a failing motherboard. Failure of motherboards is usually due to breaking capacitors. A few years ago a capacitor company stole the "recipe" for making capacitors from another company and tried to make their own, unfortunately they did not get the ingredients right and the capacitors started breaking after 2-3 years of use. They sold these capacitors at very cheap prices and a lot of computer companies and power supply makers bought them. This is easy to diagnose. Look for capacitors (caps) (they look like little tiny soda cans) on your motherboard (mobo). They should be perfectly flat on top and not bulged or swelling or leaking anything. There is something in the computer that is overheating or not getting enough power and causing it to continually reboot and now just shutdown. There are a few companies that will repair broken capacitor issues, if you find that you have that problem. Also if you add a bunch of extra components without upgrading the power supply you can suffer underpowered situations and that can cause internal parts to fail. Have you added any big video cards or extra drives?
And remember a bad PSU does not mean no power, just not enough to run the computer. If you replace the PSU make sure that you replaced it with one of the same or greater output watts. Output Watts should be listed on the outside of the PSU itself.
Since you have tried another PSU I would suspect the motherboard or even the processor (slight possibility). What is happening is that the computer cannot even perform the POST (Power on self test) so that is why you get the blinking light.

May 03, 2009 | Computers & Internet

1 Answer

PC powers on but no video


Loss of video is one of 3 things.
1) Bad or loose video card - But you get normal sounds (you can hear the Windows sound when starting up) and normal beeps. Does not sound like your problem
2) Bad or weak power supply unit (PSU). Sometimes it appears that a power supply unit is working, but in reality it is not getting enough power, usually due to some bad capacitors (caps) inside. If you swap out the power supply you have to put one with the same or greater output watts in it. Output watts can be found on a sticker on the outside of the PSU.
3) Failed or failing motherboard (mobo). This is usually caused by failing capacitors (caps). Caps look like little soda cans and they should be perfectly flat on top and not bulging or swollen or leaking anything. Visually inspect those. A bunch of computer manufacturers and power supply manufacturers got bitten by a company that years ago was making poor quality (but cheap) capacitors. Seems this company stole the recipe for the capacitors but didn't quite get the mixture right and after 2-3 years these things started failing. I have seen several e-machines with this problem.
So in my opinion you have either a weak or bad power supply or a failed or failing mobo. What is happenning is that the computer does not make it through the Power On Self Test (POST) and that is why you hear no beeps and get no video. SO I beleive that you have situation 2 or 3 mentioned above. That is where I would start looking for your problem.

Apr 30, 2009 | eMachines W3118 AMD Sempron 3100+ 1.8GHz /...

1 Answer

I have a Gateway 510xl and would like to upgrade the power supply


Changing out power supplies is not that difficult task. Upgrading to a 550 Watt power supply would be a good idea because it will give you more power than you need at the moment. You can google the power supply with the word problems with it and see what comes up. The main thing to be sure of when selecting a new power supply is to make sure that you get one with the appropriate connectors for your hard drive, motherboard and processor. For example if you have a SATA Hard drive then you will need a PSU that has SATA power connectors. Most newer power supplies (PSU) have these. The box should list what connectors it has.

Mar 12, 2009 | Gateway 510 XL Peak Performance (510XLPP)...

4 Answers

Power supply fan is loud!


Essentially any Standard ATX power supply with a rating of 250 Watts or higher will work

http://www.discountelectronics.com/index.php?l=product_detail&p=1849

Feb 04, 2009 | Dell Dimension 1100 PC Desktop

2 Answers

How much watts of power do i have?


the 9600GSO uses arounf 250 watts under load. While I cannot fing exact spec for the HP PSU I would be surprised if it were more that 350W. Is there any indication on the case or can you open the case up and look at the PSU?

9600 GSO Power

You need somthing in the order of 450W or greater. Get an Enermax, Corsair or other good quality PSU.

Jul 25, 2008 | HP PAVILION A6230N DESKTOP PC

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