Question about HP ATX-300-12Z (ATX30012ZBD) 300-Watt Power Supply

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I have a hp desktop pavilion a6700y and it has a problem. it will not start. the on off switch doesn't light at all. the power supply led light green is lite and when I unplug the power chord it does go out. But nothing seems to be getting power the fans don't run. the power supply is ATX12V-HP300BT (Bestec ATX-300-12Z CDR) part number 5188-26325

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Flashing Green Light on Power BESTEC Power Supply

Hi. NO, *********** board is not fried. I am not sure what the problem is but I do know how to fix it. It is usually casued by power outages (even if you have UPS supply).

1. TAKE OUT THE ELECTRICITY LEAD TO THE COMPUTER. Look inside the computer and find the bunch of wires coming from the power supply unit (the box thing at the top with the fan and all those colouted wires!).

2. Find where these wires run into a plastic connector and plug into the mother board. Unplug it.

3. Now plug the electicity lead back into the computer. The light should now stay ON.

4. Plug in the connector again... and boot up. Leave it run a while to convince it!

5. Repeat this process if it does not work first time.

This should fix your problem . It works for me when I get this problem.

Friend in Spain

Posted on May 09, 2009

  • 691 Answers

SOURCE: I have a burned out Bestec ATX-250-12z power supply

yes it should do provided your current psu is not a small mATX one. ATX power supplies are pretty generic. Make sure you get one that has enough connectors to suit your system, having said that, Considering it's an off the shelf PC I would guess most PSU's would have the right number and type of connections.

Posted on Jan 10, 2010

tbirdfan1
  • 3051 Answers

SOURCE: I have a burned out Bestec ATX-250-12z power supply

Hello there:
That is a pretty good choice for a replacement you just have to make sure that it will fit exactly like the old one did and that the cables are exact and have the same hookups as the old ones do ok but you should be fine from there ok
Hope this is very helpful for you
Best regards michael

Posted on Jan 10, 2010

  • 733 Answers

SOURCE: My power supply is blinking green light and my PC has no power

plug your pc directly to your wall outlet and see if it turns on. If it works, then the problem is your power supply. If power supply has a reset button, press it and try again. If pc does not turn on when plugged to wall outlet, then power supply for pc may be out.

Posted on Feb 16, 2010

rommelalilin
  • 2178 Answers

SOURCE: My hp Pavilion a847c shut

Yes - replace the power supply. It is flashing because the regulator is bad or there are bad capacitors in the power supply.

Posted on Jan 22, 2011

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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

1 Answer

HP Pavilion a1020n will not power on.


The green LED light at the back of the Power Supply, is now a diagnostic LED light.

Tells you the Power Supply is bad.

HP Support > Pavilion a1020n Desktop PC > Main Support page,

http://h10025.www1.hp.com/ewfrf/wc/product?product=459880&lc=en&cc=us&dlc=en&lang=en&cc=us

Solve a problem > Start-up / Shutdown / Power >
(No Thanks) > Power management,

Scroll down. Click on the + sign to the left of the blue -
Power supply light is on or flashes

(When the PC worked the green light stayed on constantly. You are correct)

Now,...
1) Is the computer dirty inside? Need to know how to properly clean it?
2) Would you like to know the easy test, to see if the problem may be a $5 ATX power on switch, or the Power Supply?

3) I also suggest you remove all ram memory modules, ('Stick'), and clean their gold plated contact pins, with an eraser.
There is a proper procedure for this.

Post in a Comment if you wish to know.

Regards,
joecoolvette

{By the by. Did you or your father live in K.C.K, (USA), and does the name Philip B., ring a bell? }

Jul 02, 2012 | Computers & Internet

1 Answer

Hi u doing I have problems with the power supply of my HP Pavilion a1340n. I checked the voltaje of the power cord going to the HD, I did not see any voltage, then I think is the power supply, But my...


If I had to guess with the information provided I would say that your machine is currently underpowered. How large is your power supply unit on your HP? If that's the case a quick upgrade would fix your problem.

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1 Answer

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I would start by trying a replacement power supply.
Usually when motherboards show a fault, beep codes are issued as the power is applied.

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1 Answer

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Check all wires for loose connections--- if the memory was wrong or something, it would still attempt to boot but stop during the POST and start to beep

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1 Answer

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This is a case where something that is getting switched on during start-up is causing the power supply to fail... probably due to a short. How ever I believe the short is in the power supply

This is an older HP model ( I have a 530N) with teh same problem. I bought a new power supply and installed it.

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1 Answer

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

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