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14 Posts

10-24-2011

Germany

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Re: T420 fan noise ?

2011-10-31, 22:53 PM

I need my machine till 23. November to do some work for university. After that, I will send in my T420, if needed.

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1 Posts

10-31-2011

United States

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Re: T420 fan noise ?

2011-10-31, 23:24 PM

My T420 just arrived last week and I'm really dissapointed with the loud noise coming from the fan. I have been playing with all the power manager profiles, but the loud fan still goes on. Is there any known fix for this problem? 

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5 Posts

11-05-2011

Denmark

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Re: T420 Fan noise

2011-11-05, 13:14 PM

Hmm, I'm experiencing the same problem with my T420. Using TP control, 42C -> 3586 RPM. This is at balanced parameters in power manager, and everything which has been suggested earlier in this thread. 

 

Actually the BIOS "fix" set to balanced in bios worked for a couple of days, the fan was at around 2000 rpm at idle when plugged in. However today the fan is back at 3500. I've just checked that the bios haven't change (and unfortunately it haven't). So what to do. Really like my lenovo and use it several hours every day. But it is extremely annoying that the fan runs al the time at such high setting, especially when having a class at my uni. Moreover, the battery time is worse with this fan issue due to the fan running higher than its supposed to.

 

Could it be a problem with the temperature sensor?? I've experienced it some time saying that the temperature is around 45 deg but the air that comes out is definitely not this warm...

 

Really hope you fix this soon, especially because is seems to be a problem for a lot T420 users around. 

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5 Posts

11-05-2011

Denmark

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Re: T420 Fan noise

2011-11-14, 15:03 PM
Seems like the problem has been solved in the new bios update, as I'm at least not experiencing fan issues any longer.
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3538 Posts

07-12-2010

Malaysia

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Re: T420 Fan noise

2011-11-14, 15:42 PM

@All,

 

BIOS fix for T420s fan issue.

 

BIOS here

Text here

 

Got mixed up with T420s thread. Sorry.

 

//JameZ

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207 Posts

08-28-2008

Israel

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Re: T420 Fan noise

2011-11-14, 15:55 PM

JameZ, T420s not T420.

Post it on the T420s thread.

___________________________________________________________
Lenovo Thinkpad T420s
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14 Posts

10-24-2011

Germany

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Re: T420 Fan noise

2011-11-14, 18:55 PM

bios 1.35 for T420 indeed improves the fan behaviour

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3538 Posts

07-12-2010

Malaysia

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Re: T420 Fan noise

2011-11-15, 1:27 AM
@Roy ... Sorry got mixed up =(
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2 Posts

11-15-2011

Austria

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  • Message 79 of 102

Re: T420 Fan noise

2011-11-15, 8:07 AM

Good Morning JameZ,

if i understand and read this correct the problem is fixed for the T420s models. If i look into the readme from the latest bios version for the T420S there is the following sentence:

 

[Problem fixes]

- Improved cooling fan noise on specific models.

 

In the last days i read all the topics here for the fan noise problem for the T420 because i have also the problem with the T420 and the noise fan. I have to decide now if i return the notebook now, because it is impossible to work with this notebook, or is there any progress and timeline to solve the problem also for the T420?

 

Do you have any informations about the progress to solve this problem for the T420?

 

Thanks in advance.

Gerald

 

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3538 Posts

07-12-2010

Malaysia

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Re: T420 Fan noise

2011-11-15, 10:27 AM
@Gizndler,

In Lenovo office here, all the new colleagues who joined us have either a X220 or a T420. I've checked all theirs and the results as link below.

http://forums.lenovo.com/t5/T400-T500-and-newer-T-series/T420-Fan-noise/td-p/417971/page/6

In order for me to raise a case for this, I would require a volunteer laptop to be sent into the lab as we do not have any machines here that is showing this problem. Based on the X220 fan and T420s fan thread, this thread is slow moving thus am assuming that there are some individuals who has this issue is caused by hardware thus am requesting volunteer machines to be shipped in for engineering to check on it.

If you can volunteer to send the machine in, I can arrange for it to be shipped in. I've been requesting this since page 6 or 7 of this thread.

//JameZ
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