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5 Posts

04-25-2012

Ghana

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Re: T420s Fan noise Issue

2012-05-01, 2:42 AM

Its not even about the level for me....why is it still heating up so fast....at 4633 RPM fan speed I don't expect my PC temperature to still be rising so rapidly...62-70-80-86-92....then let the throttling begin,all in about 10 minutes max....Could it be possible that my Embedded controller is reading wrong temperature values??

 

Checked the fan for dirt and there was none and I saw this rubber kinda thing on the processor..could it also be responsible?

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2 Posts

04-24-2012

Denmark

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  • Message 1072 of 1217

Re: T420s Fan noise Issue

2012-05-01, 6:59 AM

That would be the thermal pad you are seeing. Its there to minimize air gaps between the CPU and cooler thus improving the thermal junction and removing more heat from the CPU.

 

Seeing as you already voided the warrenty by opening it up (fair guess, but not sure), try buying some artic cool thermal paste and apply it to the CPU instead of the pad.

Have had some good resulting with a temperature drop of 2-5 degree's with that type of cooling paste.

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49 Posts

08-10-2011

Germany

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  • Message 1073 of 1217

Re: T420s Fan noise Issue

2012-05-01, 9:12 AM

The cooling system is just too small, butt now with the higher ambient temperatures mine has barely cool to 45 ° C down. Therefore, the fan just now hang öffter at 4k.


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23 Posts

12-17-2011

Germany

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  • Message 1074 of 1217

Re: T420s Fan noise Issue

2012-05-01, 10:02 AM

I begin to feel like the problem got worse after Lenovo replaced the broken fan. Now it takes just a few minutes to get stuck on 4000 rpm. And this happens under any circumstances, no matter which power preset was chosen.

The air coming out of the vents is still as cold as the air being sucked it.

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5 Posts

04-25-2012

Ghana

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  • Message 1075 of 1217

Re: T420s Fan noise Issue

2012-05-01, 11:32 AM

Wish I could find a video on how to do this....so what,I just take the thermal pad off and replace it with paste...or do I apply the paste and re-affix the thermal pad???....

 

Is there a way of opening the bottom of a t420s to see underneath the board without disassembling the whole thing??

 

Lenovo should have videos and manuals on how to do-it-yourself

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664 Posts

10-21-2011

Germany

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  • Message 1076 of 1217

Re: T420s Fan noise Issue

2012-05-01, 11:42 AM

@salisadecade,

take a look here: http://lenovo.f.relayware.com/content/CourseWarePublic/6628/course%20files/index.html The T420s has the same architecture as the T400s, so you can use the videos there. 

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20 Posts

08-13-2011

Germany

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  • Message 1077 of 1217

Re: T420s Fan noise Issue

2012-05-07, 20:21 PM
@ Mark_Lenovo or any other responsible person: We expect an update. Your treatment of user issues is unacceptable!
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28 Posts

01-18-2012

Texas-USA

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  • Message 1078 of 1217

Re: T420s Fan noise Issue

2012-05-07, 21:36 PM

Seriously Mark, when you are done screwing around with the term "Kudos", could you please provide this group with an update on the horrific (look that up) fan noise that my T420s makes?  We have not had an update months and this issue is close to a year old!  Very, very frustrated with having to check this board with no result day after day.  Thank you.

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23 Posts

12-17-2011

Germany

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  • Message 1079 of 1217

Re: T420s Fan noise Issue

2012-05-11, 8:57 AM

I really feel reminded of talking to a huffish child. "I made a mistake but I could never admit that!" 

 

Lenovo, your behaviour is embarrassing! 

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119 Posts

06-12-2009

Norway

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  • Message 1080 of 1217

Re: T420s Fan noise Issue

2012-05-11, 12:01 PM

Feeling very good about my move away from the T420S now :)

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