Undervolting didn't help fan noise: any recommendations

I've got a Fujitsu Lifebook S6520. Here's what I tried to curtail the constant fan noise:

-undervolting (to 0.95 from 1.2)
-downgrading to XP
-propping the notebook up
-changing BIOS to 'silent fan'
-turning off processes

The core temperature right now is 40 degrees C. When I first got the laptop, that temp came with no fan activity. Now, the fan is always on, no matter what temp or what I'm doing on the laptop.

Any suggestions? It seems that I can get the computer quite cool, but the fan doggedly wants to turn on even at low temps.

 

Have you checked the fans and heatsink exhaust vent, becuse if they are blocked the fan fill go into overdrive!

 

Yup, all clear (I just got it in the mail yesterday).

 

OK at 40C/104F? OK if fan is supposed to shut down it should at that temp. Bad sensor some hardware (Mobo) issue?

Fan is supposed to all ways run but at slower speeds? Fan is going bad. I would say bearings but well no bearings. I forget what they call but you might have broke a seal and the lubricant has escaped. Have you ever opened up and looked?

I believe a very lightweight lubricant so clues could be subtle as well most could of evaporated.

How old is notebook? When you run a stress test to raise temps does fan noise increase? Proportionally? Bad fan.

Edit:

Overheating/high temps would normally accompany this and he has ruled out?

 

zenkamal i bought a Fujistu laptop for someone that has a noisy fan it is not the same laptop that you have got though.
I also tried undervolting and that did not help either.
In the BIOS have you checked that on AC that speed step is enabled?
I found out that on AC power it was not enabled in the laptop i bought for someone but it was enabled for battery mode.

I was not able to test it for long enough to see if it made any kind difference but it is worth a try.

The laptop was bought new and i have already had the fan replaced once. It is back in service again and i have asked them to look at the fan again.

Maybe if you can return this laptop you just should if you cannot up with the noise because unless there is a BIOS update there might not actually be a solution for you.

Is the fan still as bad for you on battery power?

 

Yes, speed step is enabled. Fan activity during battery use is a mixed bag. For around 10 hours, the fan was on during battery use, but for 10 minutes today during battery use the fan was off then came back on.

I'm considering returning this and getting a laptop with an ultra-low or low voltage processor, or one that has lots of reviews pointing to little fan noise (maybe even a macbook!). Lenovos and certain Dells seem to have little fan noise, but then again the Notebookreview review of the Fujitsu 6510 said the fan wasn't an issue.