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42 Posts

06-30-2019

United States of America

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  • Message 11 of 325

Re: Bring back fan control to the Legion Y740

2019-07-01, 22:30 PM

Could you try reverting to 1.08 and let us know how it goes / how you did it?

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2 Posts

07-02-2019

Netherlands

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  • Message 12 of 325

Re: Bring back fan control to the Legion Y740

2019-07-02, 14:55 PM

Having similar temperature issues now. FN + Q seems to do a much worse job .

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7 Posts

05-18-2019

Portugal

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  • Message 13 of 325

Re: Bring back fan control to the Legion Y740

2019-07-02, 17:11 PM

I don't have acess of the v1.08 Bios, only the v1.06, but I can try to revert to the v1.06.

 

Another the update changed was the CPU TDP values. 

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42 Posts

06-30-2019

United States of America

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  • Message 14 of 325

Re: Bring back fan control to the Legion Y740

2019-07-02, 17:20 PM

What are the new tdp values?

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7 Posts

05-18-2019

Portugal

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  • Message 15 of 325

Re: Bring back fan control to the Legion Y740

2019-07-02, 19:40 PM

Far I know the CPU only boost till 45W instead of 60W, but most of the time it will keep near that value making the CPU Throtlle.

 

I'm back to V1.06 and till now it is ok. I had a problem with Killer WIFI (code 10), but a simple bios reset to optimal options fixed it.

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42 Posts

06-30-2019

United States of America

69 Signins

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  • Message 16 of 325

Re: Bring back fan control to the Legion Y740

2019-07-02, 19:43 PM

Please make a step by step guide to downgrading and post it here so we can save our fellow y740 users.

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40 Posts

06-15-2019

Portugal

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  • Message 17 of 325

Re: Bring back fan control to the Legion Y740

2019-07-02, 19:55 PM

YOU WOULD BE A LEGEND <3

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42 Posts

06-30-2019

United States of America

69 Signins

724 Page Views

  • Posts: 42
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  • Message 18 of 325

Re: Bring back fan control to the Legion Y740

2019-07-03, 1:38 AM

Per a reddit post by me:

 

Here's how you can downgrade.

FILES---

Y740 ICHg: https://download.lenovo.com/consumer/mobiles/avcn18ww.exe

Y740 IRH/IRHg: This doesn't apply to you. Only ICHg variants have 1.09, as far as I can tell. If you have a 1660ti, this is you. Otherwise, confirm in Vantage. If for whatever reason you do have 1.09, going to the Lenovo page for your sku should point you to 1.06.

Steps-----

1. Enter the BIOS, press F2 repeatedly. If you have hotkey mode on, you may need to mash FN+F2

2. Navigate to the page with Bios Backflash. Enable that.

3. save and reset with F10

4. Download and run the file linked above

5. Flash the new bios

IIRC one person after backflashing had issues with wifi not working, giving code 10 in device manager. Going into the bios again and restoring to defaults fixed it for them.

 

 

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1 Posts

07-03-2019

India

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  • Message 19 of 325

Re: Bring back fan control to the Legion Y740

2019-07-03, 13:32 PM

Need an official update from Lenovo thaat fixes this issue.

I hope it comes soon!:smileyfrustrated:

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4 Posts

07-01-2019

United States of America

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  • Message 20 of 325

Re: Bring back fan control to the Legion Y740

2019-07-03, 15:15 PM

I would personally recommend going back to the previous BIOS, I was able to get it back to the previous version and it runs just like before, very pleased

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