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On/off button for hp pc fails

On/off button for hp Pavilion PC fails to fully start the PC. The fans come on, but it appears the button is failing to fully power the whole pc -like the system board. The blue light in the button fails to stay on. Rarely, I can hit the button and the blue light stays on and everything seems to power up ok -but that was once in 30 start attempts.

I wonder if this switch (looks replaceable) is bad and can be replaced - has 6 wires from it to the system board?

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  • Babu Konduru May 11, 2010

    Replace the SMPS with a higher watts one. it should be fine.

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It sounds like a motherboard. HP is notorious for this problem.

Posted on Apr 11, 2013

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I worked on an older system and it could be a bad motherboard

Posted on Nov 16, 2009

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1 Answer

New case fan running but still getting error message system fan failed.


Did you try;

Power off, power unplugged to computer.
Press the Power On button, and hold it in. Hold for a count of 10 seconds.
Let go.

Do this procedure two more times.

Plug the computer back into power. WAIT 1 minute, turn the computer on.

This method clears CMOS Error Codes, and sets BIOS Setup back to the factory default settings.

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00864946&tmp_task=prodinfoCategory&cc=us&dlc=en&lang=en&lc=en&product=3340228#N436

CPU fan spinning at required minimum RPM's?

Not talking about the SYS_FAN (Case fan)



Regards,
joecoolvette

Jan 18, 2013 | HP Pavilion a1720n PC Desktop

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

Hi. I have a HP laptop pavilon dv 4t Entertainment pc. frequently its interactive log on process fail. Also it seems too slow to boot and I think in all processes it is slow working while its fan works...


the is overheating, ever get the lent cleaned out.
all CPUs run slower if overheated, all do, or halt. of too bad.
run it with no battery yet, see if all is ok, first.?
batteries are #1 failure point items.
no pc can run too long, and not pack full of lent.
why not just get the PC serviced by a tech, he knows all this magic.
cleans it, tests it, etc..

Jun 27, 2017 | HP Pavilion dv4t Entertainment PC - 2.4...

1 Answer

Hp pavilion a450n problem fan is running on high and keeps shutting down


First off - have you ever cleaned inside the case? You'd be very surprised how much dust often builds up inside a PC. After that it sounds like you might have another fan which has failed. PCs often have more than one inside and they also have temperature sensors to keep the CPU cool. If a case fan has failed it would not have air flowing inside to cool off the other components and then the CPU sensor would kick the processor fan into "overdrive". One thing to note; the difference between a two wire fan and a three wire fan is that the third wire is used to confirm the speed of the fan. Fans are usually easy to replace - just get the right size and the same right plug.

Apr 21, 2010 | HP Pavilion a450n PC Desktop

1 Answer

My HP Pavilion 21020n has given me an error message stating my system fan failed, where can I find the system fan?


open up the chasis and on top of the cpu the fan is located
try to reseat the cables of the CPU fan located beside the fan and if it doesnot work get a new compatible fan and get it installed by a local tech


















Mar 11, 2010 | HP Pavilion a1010n (PS563AA) PC Desktop

3 Answers

I have a presario R3000 notebook. just like to ask if the fan for ventilation underneath is working in a certain temperature. or it will automatimatically running when i plug in.. can some one help me....


There are several models of this notebook depending on the processor. Some only have one fan, otehrshave two. When operating the fan should start running. I have the higher spec R3000 and my fans start soon after the machine is turned on and sometimes throttle down if I have no activity. Upon starting to use it, they soon start again. Considerable hot air will come out the right back and side.

DO NOT block the air intake(s) on the bottom of the unit !!! You can burn up the processor.

Sep 25, 2009 | Compaq Presario R3000 Notebook

4 Answers

System fan has failed


Your system's fan has failed. If it is under warranty, you need to have HP made aware of this failure.

Jun 18, 2009 | HP Pavilion a1410n (ER890AA) PC Desktop

2 Answers

Hp pavilion a305w isnt working


sounds like it is in standby mode..........try pressing and holding the power button until it turns off fully. then remove the power cable to reset the power supply, wait for 5 mins then plug in and try again,

it is also possible that you have a fault , possibly a failed power supply, it might be best to investigate that if the power reset doesn't work

Sep 17, 2008 | HP Pavilion a305w (DM181AR) PC Desktop

1 Answer

Cpu fan error


POST troubleshooting steps. If a fan has failed (especially the heat sink fan for the CPU)

Good Luck, Please dont for get to Vote.Thank you.

Dec 16, 2007 | HP Pavilion dv1000 Notebook

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