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SHalbouni
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Posts: 32
Registered: ‎11-24-2015
Location: Canada
Views: 3,928
Message 1 of 11

How to rollback BIOS? Yoga 2 Pro

Hello, anyone know how to rollback the bios or know how to get the older bios version for yoga 2 pro.  seems lenovo only lists the newest one.  thanks!

hnadeir
What's DOS?
Posts: 4
Registered: ‎12-10-2015
Location: Boston
Views: 3,887
Message 2 of 11

Re: How to rollback BIOS? Yoga 2 Pro

I am on the same boat as you are. I really do appreciate what Lenovo did with the bios update. The fan is now much more silent. However, I noticed that the PC is noticable more slugish. I would love to know if a roll back is even possible. 

SHalbouni
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Posts: 32
Registered: ‎11-24-2015
Location: Canada
Views: 3,882
Message 3 of 11

Re: How to rollback BIOS? Yoga 2 Pro

what?? the bios update might have destroyed my fan.  its always running.  yours is silent now?? seriously?? what the heck is going on

hnadeir
What's DOS?
Posts: 4
Registered: ‎12-10-2015
Location: Boston
Views: 3,877
Message 4 of 11

Re: How to rollback BIOS? Yoga 2 Pro

My fan used to be super loud. But now, it is under control. However, I fear it might not be running enough. I play games that are easy on the GPU, like FIFA. My fear is that my PC might run way too hot if the fan is this silent. But honestly, I am an idiot and this could be all in my head. 

hnadeir
What's DOS?
Posts: 4
Registered: ‎12-10-2015
Location: Boston
Views: 3,876
Message 5 of 11

Re: How to rollback BIOS? Yoga 2 Pro

When you enter the bios, does it give a bios rollback option? 

SHalbouni
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Posts: 32
Registered: ‎11-24-2015
Location: Canada
Views: 3,872
Message 6 of 11

ent. Re: How to rollback BIOS? Yoga 2 Pro

no you will be fine. it should be silent.  mine was silent the whole time for a  year with no issues.   i went into the bios and it only gives an option to allow or disallow rollback.  

hnadeir
What's DOS?
Posts: 4
Registered: ‎12-10-2015
Location: Boston
Views: 3,869
Message 7 of 11

Re: ent. Re: How to rollback BIOS? Yoga 2 Pro

The previos bios update used to be at their website but they updated it with the new one. So, someone at Lenovo must have the old bios. 

AshishKharel
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Posts: 20
Registered: ‎12-19-2014
Views: 3,832
Message 8 of 11

Re: How to rollback BIOS? Yoga 2 Pro

Hello! Have you found the old BIOS you are looking for? If not, then do this::
Here are some of the links to the versions which are self-evident by examining the link::
1> https://download.lenovo.com/consumer/mobiles/76cn42ww.exe
2> https://download.lenovo.com/consumer/mobiles/76cn41ww.exe
3> https://download.lenovo.com/consumer/mobiles/76cn38ww.exe
You can make your own link by yourself, using trial and error. Thank you...
SHalbouni
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Posts: 32
Registered: ‎11-24-2015
Location: Canada
Views: 3,817
Message 9 of 11

Re: How to rollback BIOS? Yoga 2 Pro

Hi, thank you very much for that.  Although that didnt help me with my fan issue, it did rollback my bios so I accepted your answer as the solution.  Thanks!!

icelava
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Posts: 18
Registered: ‎04-19-2016
Location: SG
Views: 3,618
Message 10 of 11

Re: How to rollback BIOS? Yoga 2 Pro

How do you get the flash program to revert to an older version? It simply refuses to carry on.

 

---------------------------
Error
---------------------------
The version of ROM file is not newer than that of BIOS.
---------------------------
OK
---------------------------

 

Even if I edit the local platforms.ini config file [Bios_Version_Check] section to skip version check, the file gets overwritten back to default settings on launch.

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