no power and green light on my hp pavilion is flashing (124528 Views)
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Honor Student
jdoody8531
Posts: 2
Registered: ‎05-28-2011
Message 1 of 65 (124,528 Views)
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no power and green light on my hp pavilion is flashing

Hello,

 

I'm trying to figure out if the power supply on my hp is bad or not. The green light on back of the tower is flashing and the computer won't turn on. I've tried all of the preliminary things and nothing works -- the green light keeps blinking until I disconnect the large plug to the motherboard, then the light stays on and doesn't blink. Once I have the power cord disconnected and the main plug to the motherboard disconnected as well, I then have tried replugging the power cord and then replugging the main plug to the motherboard (kind of trying to jump start it), the fan tries to come one (but only for a second, then goes back off, so it won't boot).

Does anyone know if this means that the power supply is bad or if something else might be wrong? I'm wondering if the power supply would be bad when the computer is clearly trying to start, but not quite making it.

Regents Professor
wb2001
Posts: 4,592
Registered: ‎09-28-2010
Message 2 of 65 (124,486 Views)

Re: no power and green light on my hp pavilion is flashing

What model of HP do you have?

Here is the generic troubleshooter for HP PSU:http://h10025.www1.hp.com/ewfrf/wc/document?docname=bph06788&tmp_task=solveCategory&lc=en&dlc=en&cc=...

 

If it's the PSU, let us know. I will gladly offer suggestions on a new PSU that fits your model.


The Law of Effect states that positive reinforcement increases the probability of a behavior being repeated. (B.F.Skinner). You toss me points, and I perform better.

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Honor Student
jdoody8531
Posts: 2
Registered: ‎05-28-2011
Message 3 of 65 (124,484 Views)

Re: no power and green light on my hp pavilion is flashing

It's a Pavilion a6200n. There was a power outage and that's when the comp wouldn't start and the light starting blinking. I have disconnected the big plug on the motherboard and that makes the green light stay on without blinking. If I disconnect the same plug from the motherboard while the comp is plugged in, and  then replug it into the motherboard, the fan tries to come one most of the time, but it won't start. I've gone through these checks already, but haven't disconnected everything because the light comes on when you disconnect the big plug. Thanks for getting back to me. What do you think?

Regents Professor
wb2001
Posts: 4,592
Registered: ‎09-28-2010
Message 4 of 65 (124,468 Views)

Re: no power and green light on my hp pavilion is flashing

You need to folow the steps exactly.

IMHO, I would try a new PSU,  as your old 250W is marginal. Dimensions: 140L x 150W x 86H mm (5.5" x 5.9" x 3.4")
Efficiency: 68% minimum at full load. When you pull it out, it probably states 200W on the 12v rail.

You can do better with a 80+ efficiency PSU in the 350-430W range.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817182202

This one will give you 396W on the 12v rail.


The Law of Effect states that positive reinforcement increases the probability of a behavior being repeated. (B.F.Skinner). You toss me points, and I perform better.

To say THANK YOU, press the white "thumbs up" on the left, to render a KUDO.
Please click Accept as Solution, just to the right of my reply if your problem is solved.
You can render both Solution and KUDO

HP DV7t i7 3160QM 2.3Ghz 8GB WIN7-64bit
Custom Asus P8P67 board, I7-2600k, WIN7 Pro 64bit, GTX670 2GB, 16GB RAM, 750W OCZ, 1T HD SATA 6Gb/s
HP m9200t CTO,Win7 Pro 32 bit. ASUS 550Ti 2GB, Rosewill 630W
HP m8100eCTO WIN7 Ultimate 32bit. XFX5670 1GB, Rosewill 530W.
Printer -- OfficeJet Pro 8600 Plus, HP Deskjet F4135



Top Student
paulmar
Posts: 4
Registered: ‎10-04-2011
Message 5 of 65 (123,509 Views)

Re: no power and green light on my hp pavilion is flashing

My wife's computer has been having the same problem several times. One solution I found that worked before was to unplug the motherboard power cable and the PSU power cable from the back of the PC and then connect the power cable and connect the motherboard power cable while holding down the power button. Scary, to say the least, but it worked, until one day I accidentally flipped the wrong breaker and then spend two hours trying the same solution with no luck and Googling again. And here is what I found. This is the simplest yet crudest solution. It’s easy and non invasive and it doesn’t matter how tech savvy you are. Take a blow dryer and turn it on to blow air at the back of the power supply for a couple minutes. When you see the light turn green you’re all set. It's worked for me after it worked for a hundred others, maybe more. See the testimonials on this site: http://talk19.wordpress.com/2008/01/13/hp-m7088d-power-supply-led-blinks-green/. It’s a shame that nothing like this appears on any HP site. So don’t waste your money on a new MoBo or PSU. All you need is your wife’s hair drier.

Honor Student
ZurichCH
Posts: 1
Registered: ‎11-02-2011
Message 6 of 65 (122,926 Views)

Re: no power and green light on my hp pavilion is flashing

Thanks paulmar, I've also had to do the same procedure everytime the electicians come. I always forget to turn off this old HP Presario SR1103WM that I use as an ever-running server and end up with the green LED light flashing on the power switch. Anyway, as you said,

 

unplug the PS power cord,

unplug the Motherboard (MoBo) main connector,

reconnect the PS power cord,

hold down the power switch on the front of the desktop,

CAREFULLY (I know, scary),

reconnect the MoBo main connector while still holding the main power switch down.

 

btw. Wear some thin latex gloves if it makes you feel better.

 

What I can add to your comment is only that sometimes it takes SEVERAL times (10?) before the PC kicks in and the power really starts, so just keep keep plugging and unplugging that MoBo main power plug several times while holding the front PC switch until you hear the fans start to go. Of course there's always a possiblity that you really do have a bad PS, especially if it's over 8 years old or so in my experience. Good luck everyone.

 

CH-iao

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erico
Posts: 23,335
Registered: ‎01-07-2009
Message 7 of 65 (122,912 Views)

Re: no power and green light on my hp pavilion is flashing

[ Edited ]

If the PSU blinks it needs to be reset.

unplug the electrical cable from the wall and the PSU.

move the red voltage selector to the opposite position it is in and then slide it back. If you live in the USA 120Vac-->220Vac-->120Vac see the image below.

 

 

After you have done this you can plug the power cable back into the PSU.  Connect the power cable to the wall power. If the PSU is still serviceable it will no longer be blinking.

 

Best regards,

erico



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Honor Student
saltlife69
Posts: 1
Registered: ‎11-05-2011
Message 8 of 65 (122,726 Views)

Re: no power and green light on my hp pavilion is flashing

It worked it worked....thank u thank u thank u.....7 mos without a home computer because i thot it was my motherboard....
Provost
erico
Posts: 23,335
Registered: ‎01-07-2009
Message 9 of 65 (122,725 Views)

Re: no power and green light on my hp pavilion is flashing


saltlife69 wrote:
It worked it worked....thank u thank u thank u.....7 mos without a home computer because i thot it was my motherboard....

You are quite welcome.

 

regards,

erico



****If my suggestion was helpful, you can say thanks by clicking on the purple thumbs up icon in the lower left corner of a post ***

****Please click on the Accept As Solution button if my suggestion resolves the issue you were having****
****I am a volunteer, I don't work for HP****


Microsoft MVP - Microsoft Windows Expert - Consumer

Honor Student
Browns
Posts: 1
Registered: ‎11-06-2011
Message 10 of 65 (122,603 Views)

Re: no power and green light on my hp pavilion is flashing

OMG, this idea was fabulous! At first I was worried because it was taking so long for the green light to become solid, but just when I almost gave up, it was solid... Who knew that a hair dryer (my wifes hair dryer) would work! The power of the internet with its search engines are the BOMB! Thanks guys. Like you said be patient, and it will get done...

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