fan runs full speed at start up

[HardBeatZ]

Hello mpw101,

Thank you for the update! Glad to hear you have everything in working order now.

[mpw101]

Bad news.  When I started my computer this morning the fan came on loud and racing.  I let start up finish.  The fan continued loud.  I clicked shut down.  When shut down finished I started the computer again.  There was a brief, one second, burst of racing fan and then it was normal and quiet.

I sent an email to the HP Case Manager who has been helping me and will wait to here from him on Monday.  There are no error messages anywhere.  None of the event log files (Administrative, Application, System) shows any errors.  It appears to have been a normal start.

And yet the fan was loud/racing until I shut the computer down and restarted.

[mpw101]

HP Tech just left my house.  He could not produce the problem or find a reason.  I am supposed to keep a record each time it happens and make a note of date and time.  Also let it run for a couple minutes after Windows loads to see if it will stop itself.  Then go ahead and restart which is how I have been stopping the problem when it happens.

The tech thinks it is a motherboard problem because the fan comes on loud and racing the second I push the start button.  Even before the HP splash screen appears.  And it continues while Windows loads and until I restart the computer.  He knows I just got a new motherboard and thinks I may have gotten another bad one.

It has not happened again since my 9-22-2012 post.

[scotsilv]

What was the outcome of all this?

I am having a similar issue with an HP-P7 1222.  Occasionally after powerup, internal fan is at hyperspeed and very, very noisy due to mass airflow.

On reboot (e.g., cntrl-alt-del) immediately return to low speed/quiet.

HP support told me to set powerplan CPU power management system cooling policy from "active" to "passive", but this problem occurs before Windows ever loads.

I think it's a bios/uefi code problem.  Machine has a BIOS v. 7.19 later than the one at the HP support site (7.16 Rev. A).

A few years ago I went through two Intel motherboard-based Core I5 machines from Microcenter with the very same problem.  I returned both.  Intel never responded to inquiriea bout the fault.

[mpw101]

I have been meaning to update this.  On Dec 9, 2012 HP sent me a new computer.  It was then that I realized the previous computer had never started correctly.  This new computer starts with a one second burst of fan every time I start it or it wakes from sleep.  It is supposed to do that.

With the previous computer it was quiet or nonstop loud racing fan.  Mostly it started quiet.  No short fan burst sound at all.  Then sometimes when I turned it on, the fan started loud and racing instantly, before anything loaded.  I let it go once for half an hour and it made the same sound continuously that my current computer makes for one second.  The only way to stop it was to restart and then it would start silent.

Neither the factory nor the tech that came to my home could reproduce the loud racing fan on start up.  But curiously neither ever mentioned that the fan was NOT making the one second fan burst that it should be making.  I never knew this was supposed to happen until I got the replacement computer, but I think they should have. 

Anyway, on the old computer, the BIOS were reset once and updated once and the motherboard was replaced once at the factory and once in my home and nothing worked.  So HP gave up and sent me a new computer.

It took a long time because the fan noise was so unpredictable.  It could be silent days or weeks; I never knew when it was going to happen.  Then I would have to get a new case manager because they can’t hold cases open and they closed my case and I would get a new one when the fan problem returned.

I was happy with most of the case managers who helped me and very satisfied with the resolution.  I don’t know if it was the BIOS, three bad motherboards or maybe something with the fan switch that was never mentioned or explored.

HardBeatZ (8/24/12 10:57 AM post) was extremely helpful when he connected me with case managers.  That made all the difference.

Hope this helps.   

[scotsilv]

Was the replacement the same model of computer?  It seems three bad motherbboards in a row is unusual to say the least.

is the "swooshing" on startup on your new machine coming from the power supply fan?  Some power supply fans start up fast and then slow down.

I am really tired of all this stuff.  There should be no mysteries about a problem like this.

[scotsilv]

By the way what is the BIOS version of your replacement machine?  It appears its the same Carmel2 motherboard as my P7-1222.  This one came with BIOS v. 7.19 that does not even appear on the HP support pages.

[mpw101]

The original computer Model was HP PAVILION p6-2037c.  The replacement computer model is HP PAVILION p6-2220t.  Both run Windows 7 sp1 64bit.

The loud fans in the original computer were the one that blows on the motherboard and the one that blows out the back of the computer.  I took the side panel off once when they were racing and it looked and sounded to me that both were racing loudly.  Also there was a lot of air exiting the back of the computer when it happened.

I just took the side panel off my current computer and then turned it on.  The fan that produces the one second blast of air looks and sounds to me like it is the one blowing on the motherboard. 

The BIOS version on the replacement computer is 7.06.

Good luck.  I hope I have helped you.

[scotsilv]

Indded you have.  The MB in your replacement machine is a Cupertino3 (http://support.hp.com/us-en/document/c03329092#N86).  The MB in your original machine (and in my P7-1222) is the IPISB-CU (Carmel2), http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c02980014 .

Same chipset, but different BIOS.

It's hard to believe those three Carmel2 MB's - and the one I'm using now - were all defective.  I figure the problem with the Carmel2 is not uncommon, and may be due to various BIOSes floating around. 

I'll probably just tolerate it until some new BIOS comes out.

By the way...it seems that setting "maximum S5 power savings" to "off" may have stopped the problem.  Perhaps a startup glitch when s5 power was minimal can cause the fan controller chip to not initialize properly.  I looked at its specs and it has a "reset" line that obviously gets triggered when the computer is reset.

Time will, as you noted with this board, tell.

[scotsilv]

Fans full speed again at powerup this evening.  I let windows boot and ran SIW.  See attached image.  One temp sensor is showing 99C.

After reboot and fans at normal (~1000 RPM) speed, sensor shows 32C.

See attached image.

I am calling service.