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3538 Posts

07-12-2010

Malaysia

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  • Message 261 of 1217

Re: T420s Fan noise Issue

2011-08-23, 2:45 AM
@All,

Engineering have viewed Dan0's clip and they mentioned that they have 2 T420s which they have tested without the issue as shown in Dan0's clip. They are requesting a customer from US to ship their unit to the lab for them to diagnose.

For those in the US, appreciate if you can drop me a note and I will proceed to arrange a box to be shipped to your location.

//JameZ
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2 Posts

08-23-2011

Michigan, US

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  • Message 262 of 1217

Re: T420s Fan noise Issue

2011-08-23, 9:45 AM
I can confirm also that I have the exact same problem, I ran the tests that Dan0 ran in his clip and had the same issue with same results. PM version is 3.61, BIOS has been updated to the latest version as of 8/21/2011 no luck.
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3 Posts

08-23-2011

Boston

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  • Message 263 of 1217

Re: T420s Fan noise Issue

2011-08-23, 9:46 AM

Yes, I too have a noisy t420s. Is there an update that will fix this?

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15 Posts

07-20-2011

Switzerland

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  • Message 264 of 1217

Re: T420s Fan noise Issue

2011-08-23, 10:06 AM

Dear all,

 

I just bought a T420s, and it works wonderfully under Linux (Debian).

 

The only issue is the fan which remains constantly ~4000rpm, whatever the temperature is.

 

If I understood correctly, the embedded controller should modulate the fans properly, even under Linux. Is there any plan for an update of the BIOS/firmware to fix its current behavior?

 

Best,

 

--

Francois Fleuret

 

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5 Posts

08-19-2011

Switzerland

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  • Message 265 of 1217

Re: T420s Fan noise Issue

2011-08-23, 10:46 AM

@JameZ

 

When can we expect fixing this issue ? Every single day lenovo is loosing clients and trust because of this **bleep** fan and needs almost 3 months to change few numbers in BIOS. 

 

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20 Posts

08-13-2011

Germany

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  • Message 266 of 1217

Re: T420s Fan noise Issue

2011-08-23, 19:15 PM

JameZ schrieb:
@All,

Engineering have viewed Dan0's clip and they mentioned that they have 2 T420s which they have tested without the issue as shown in Dan0's clip. They are requesting a customer from US to ship their unit to the lab for them to diagnose.

For those in the US, appreciate if you can drop me a note and I will proceed to arrange a box to be shipped to your location.

//JameZ

Sorry JameZ, but is engineering kidding? It seems to me, that they are sitting the problem out. I expect, that they proof their tested two T420s with a video like Dan0. :smileywink: If they received too less proof on this issue yet, I think here are enough users, who can gladly send engineering their T420s. Theme is getting more and more questionable.

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62 Posts

05-26-2011

Switzerland

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  • Message 267 of 1217

Re: T420s Fan noise Issue

2011-08-23, 21:18 PM

@ All: I appreciate your acknowledgments very much.

 

@ dths + mtness: Thanks for the kudos! 

 

@ JameZ: you're welcome, I hesitated to mention your name, but as I see it is very welcome. 

 

@ Trubadix: how did you get here and found out that your TPFancontrol was doing wonders? I personnaly didn't get to make you a donation but I'll fix this asap. I have to get my new MasterCard and activate my PayPal account with it. 

 

@ Egineers: Yeah a video proof of two properly working T420s with SSD and Core i7 2620M would eventually make us beleve there's some hope. 

 

I just saw YouTube messed again with video title and comments. It didn't save the one's I entered. I updated video description and title. 

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3538 Posts

07-12-2010

Malaysia

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  • Posts: 3538
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  • Message 268 of 1217

Re: T420s Fan noise Issue

2011-08-24, 2:56 AM

@All,

I don't see why would engineering want to "bluff" and said there are no issues with theirs after they upgraded the BIOS for the T420s.

 

Their test logs.

 

---
Testing  4170-32U, BIOS 1.09, embedded controller 1.05.    

 

Booted to BIOS, after about 15 minutes, fan is at a very high RPM.

 

With base Win7 Ultimate 64 preload, I installed HWINFO32 to monitor the fan. 


Machine sitting at idle after several minutes, fan is running at just over 4000rpm.  Power scheme is Energy Saver.


 

Updated BIOS to 1.25 / embedded controller 1.09.  Several minutes after Win7 has booted, fan RPM drops to approximately 1900.

BIOS / EC fan fix works.


 

-- Next T420s---

 

testing a second T420s: 4174-28U, BIOS is 1.13, EC is 1.08.

 

Second machines results the same as the first.  After updating BIOS / EC, fan runs at lower rpm. 

 

----

 

Thanks to Dan0's video which I've passed to them and they have advice to send the laptop to their lab to diagnose it as they are unable to see the similar symptom in the lab.

 

So for those who are in the US, appreciate if you can drop me a note on this then I will request them to send a box to you.

 

//JameZ

 

 

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3 Posts

08-23-2011

Boston

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  • Message 269 of 1217

Re: T420s Fan noise Issue

2011-08-24, 9:09 AM

Could you post instructions for upgrading the BIOS and embedded controller? 


Tx

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207 Posts

08-28-2008

Israel

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  • Message 270 of 1217

Re: T420s Fan noise Issue

2011-08-24, 9:13 AM

James...
I have BIOS 1.25 and P.M 3.62 with "balance all parameters" with profile "Energy Star".
FAN 4000RPM!!!

CPU 40-45 celsius.

I am in Israel.

___________________________________________________________
Lenovo Thinkpad T420s
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