Question about HP Bestec ATX-1956D 200w HP Part No 0950-4106 (ATX1956D) Power Supply

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Have an hp pavilion desktop that wont power up. Power supply has no output. External a/c power green light is on but no fan action. How do I test the power supply

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You can purchase a power supply tester, they are not that expensive. Here is a link for some and if you want you can shop around. Make sure to get a 20/24 pin tester.

http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&DEPA=0&Description=power+supply+tester&x=0&y=0


Also if you do have a bad power supply here is a replacement.

http://itwinkle.stores.yahoo.net/hi20posu09h.html

Hope this helps you out.


Posted on Mar 01, 2009

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Posted on Jan 02, 2017

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Hp pavilion modelp6510f press power switch on top of pc does not light computer fans blow but compute does not turn on


ok th p6000. complete range when they were made had to be recalled as they put the copper expansion pipes ran across the gpu & cpu hence a massive overheat problem. they put copper shims over the cpu & gpu but this worked for a short time but it was inevitable and both units ended up being cooked i had this problem with mine. so if you have tried external monitor with no images it would sound or more likely to be the gpu cooked sorry for the bad news.

Jan 28, 2014 | Computers & Internet

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Green power supply light is flashing so power is getting to the computer, however the computer will not start from start button. Have removed case and tried ***** start button. Didn't work. Comput


Power getting to the computer/Power Supply?
Yeah.

Power Supply good? -> NO

A) IF ALL of the LED lights were on at once, they would use less than 1 Watt of power.

B) EACH fan uses 2 to 3 Watts of power.

C) A typical Processor can use from 51 to 125 Watts of power.
Just depends on what Processor it is.

HP Pavilion a810n Desktop PC?
Uses an AMD Athlon 64 3300+ processor,
(Operates Up To a frequency rate of 2.4GHz)

http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&dlc=en&cc=us&docname=c00280647

http://en.wikipedia.org/wiki/List_of_amd_athlon_64_microprocessors#.22Newcastle.22_.28CG.2C_130_nm.29

Can use up to 89 Watts of power.

Your Power Supply doesn't even have enough power to spin fans, much less start the Processor.

Want to test the Power Supply? Have a multimeter?
No? Have a power supply you can borrow for a test unit?
KNOWN to be good, and Compatible?

For additional questions please post in a Comment.
Regards,
joecoolvette

Aug 05, 2012 | HP Computers & Internet

2 Answers

Power supply unit starts (fan running) but computer does not....


Try swapping out the ram 1 at a time, making sure there is one memory piece there while testing. If no! check hard drive for activity.

Mar 14, 2012 | HP Pavilion a1102n PC Desktop

1 Answer

Start up light flashes once and it won't power on


Most probable cause is the power supply. Look at the back of the computer, check the voltage settings located near the power cord. This will be the small red tab indicating two different settings, If your in the US it should be set to 115. Also, the power supply should run the internal fan when it is turned on.

To test the power supply try this:

Open your computer case and locate the gray box that is the power supply unit. Trace the wires from the power supply to the boards and devices and disconnect all the cables by unplugging them.

Find the big connector plugged on the the motherboard, make sure it is disconnected and short the two pins: (GREEN & BLACK) Short green pin (14) to GND (any black) to switch power supply ON, disconnect green from GND to switch OFF.

This will switch the power supply, you should hear or see the fan in the power supply spin. If you do not see the fan spinning, and your sure you have shorted the correct wires, you have a faulty power supply. If you see the fan spinning, you can now test the voltage coming out of the power supply.

Place a volt meter on the following colors to test voltage:

The color code for the wires is: Red = +5V, Black = Ground (0V), White = -5V, Yellow = +12V, Blue = -12V, Orange = +3.3V, Purple = +5V Standby (not used), Gray = power is on (output), and Green = Turn DC on (input).

Feb 12, 2011 | HP Pavilion a6110n PC Desktop

1 Answer

My hp pavilion a430n is not turning on. even though i pressed the power button the light wont even turn on. it is truly annoying and the screen says something about the power supply and green, red, blue...


I suggest to open your computer and unplug your power supply and look for the color green and black cord which plugged from your motherboard. Then find a piece of wire and short the color green and black wire to test if your power supply is working and plug to your power socket. And check your electronic parts (capacitor) near at your processor, it might your capacitor blown out.

Nov 15, 2010 | HP Pavilion a430n PC Desktop

1 Answer

My a730n computer will not turn on. The green light flashes in the back. Local frys tested power supply and said it was working. Fans dont come on...nothing?


it could be a mother board problem or Power supply issue. Even if the power supply works it wont supply required voltage to some components.Its better you get a new power supply and test it.Still its not working it could be a mother board issue.There will be a chance for power button issue also.

Aug 24, 2010 | HP Pavilion A730N (PJ510AA) PC Desktop

2 Answers

I have a hp pavilion 513c it wont boot up! the


Hello,

There are only two ways this can go for you.

One- you need a new power supply

OR

Two, you need a new mother board

You can verify the power supply by checking it on another machine

If the power suppy is good

And you do not hear the bios beep- then you are looking at a new motherboard- I would double check the powersupply first- most stores that sell them will let you check before you buy a new powersupply.

Mar 26, 2009 | HP Pavilion 513c PC Desktop

1 Answer

HP computer doesn't turn on


Your power supply is bad--you will need to replace. I suggest looking at tigerdiect for a replacement.

Dec 12, 2008 | HP Pavilion a305w (DM181AR) PC Desktop

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