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21 Posts

12-24-2018

United States of America

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Re: Yoga C940 4k - Fan runs constantly

2020-01-07, 1:29 AM

Thank you and excellent post! I will try repasting as well. What do you mean by "reseated the fans"? 

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16 Posts

01-02-2020

Germany

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  • Message 102 of 144

Re: Yoga C940 4k - Fan runs constantly

2020-01-07, 12:14 PM

Thanks. I just loosened them and realinged especially the exhaust part. Very hard to describe. I think this varies extremely from device to device.

 

Has anbody experimented with thermal pads? I have a few lying around here from my Dell XPS times...

 

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16 Posts

12-19-2019

Poland

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Re: Yoga C940 4k - Fan runs constantly

2020-01-07, 17:00 PM

In my case whole L 81Q9 module has been replaced by Lenovo. I think it's even worse than before. Waste of time.

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21 Posts

12-24-2018

United States of America

39 Signins

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Re: Yoga C940 4k - Fan runs constantly

2020-01-07, 17:07 PM

Are you saying you sent it to warranty, they changed the fans, and it's still the same thing?

What does that module mean? 

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16 Posts

12-19-2019

Poland

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Re: Yoga C940 4k - Fan runs constantly

2020-01-07, 17:27 PM

Yes, I sent it to warranty and according to the summary I received, they have replaced whole thermal module (fans and radiator). I But it still emits high-pitched sound. But I can hear that it differs from the laptop's position. When I place it on something soft that covers the bottom grill, then it gets deifnitely quieter. Sometimes when I work the sound is not annoying, but after some time it starts to be.

 

I checked again and covering right part of the grill (left when upside down) reduces the noise greatly as mentioned in previous posts. Maybe it's not the fan issue, but just poor design of a grill? I don't know what to think anymore. 

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2 Posts

01-06-2020

Malaysia

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  • Message 106 of 144

Re: Yoga C940 4k - Fan runs constantly

2020-01-19, 9:11 AM

So basically there is no way to fix this for now?

 

And also the Lenovo Vantage is such a horrible application. Should have the option to turn off the intelligent cooling mode and opt for the quiet mode.

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147 Posts

12-08-2019

United States of America

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Re: Yoga C940 4k - Fan runs constantly

2020-01-20, 17:00 PM
New BIOS update is out, has lowered my idle temps to almost always >39 degrees on battery. This should also help for people that fans turned on constantly.
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2 Posts

01-06-2020

Malaysia

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  • Message 108 of 144

Re: Yoga C940 4k - Fan runs constantly

2020-01-20, 18:21 PM
I don't see any update though
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147 Posts

12-08-2019

United States of America

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Re: Yoga C940 4k - Fan runs constantly

2020-01-20, 18:32 PM
https://support.lenovo.com/us/en/downloads/ds541233

For c940-14 inch
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16 Posts

12-19-2019

Poland

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Re: Yoga C940 4k - Fan runs constantly

2020-01-20, 18:46 PM

Bios update didn't help much in my case, temps around 47°C in idle. I'll also test that tomorrow during work.

 

I'm still waiting for the bottom cover replacement, as it came from tech service dented and with signs of prying it open. Should've expected that.

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