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blujacket
Paper Tape
Posts: 2
Registered: ‎02-29-2016
Location: India
Views: 700
Message 1 of 5

z50-70 boot hang after BIOS update

The laptop was working fine before the recent BIOS update. Now, after the update it permanently hangs right after I turn on the device(specifically when the dots go around in circular fashion). I've to long press power button and reboot and then it works fine. But it hangs everytime I boot the system for the first time.

I reinstalled windows but the problem persists, Lenovo service centre guys told me to do that after they ran the hardware diagnostics software and concluded that the hardware was not the problem.

Is there a method to flash the older version of BIOS? And can anyone provide the file??

 

Sr Support Specialist
Posts: 8,374
Registered: ‎11-30-2015
Location: PH
Views: 693
Message 2 of 5

Re: z50-70 boot hang after BIOS update

Hi blujacket  , 

 

 

Welcome to the Community Forums. 

 

Performing BIOS changes may pose danger of bricking the system .

Likewise BIOS is a firmware and is considered part of the hardware technically.

 

As such proper guidelines should be followed and better yet call in tech support for the instructions and BIOS version to try. You can just inform them that this issue happened after a BIOS update that even reinstalling Windows would have the same issue. 

 

Most important here is that in case things would go wrong , they can send it for immediate repair . 

 

Update us how it goes. 

 

 

Regards

 



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blujacket
Paper Tape
Posts: 2
Registered: ‎02-29-2016
Location: India
Views: 639
Message 3 of 5

Re: z50-70 boot hang after BIOS update

Hi spidey101, I contacted customer support and after a long chat, one of the two exec's I spoke to told me to increase the number of processors at startup. Well it works, but I do face the same problem atleast 1 out of 10 times I boot the system. BTW it is a temporary hang, it takes about a minute or two and then continues booting. 

I have to mention this, Lenovo customer support was great! They even called me a couple of days later to check if the problem is resolved.

How to increase No. of cpu's at startup?

Windows+R> type" msconfig">Go to boot setting> advanced options> No. of processors> select max number available.

(in my case it was 4)

 

 

Sr Support Specialist
Posts: 8,374
Registered: ‎11-30-2015
Location: PH
Views: 621
Message 4 of 5

Re: z50-70 boot hang after BIOS update

Hi blujacket , 

 

Greetings. 

 

With regards to increasing CPU start up you may click here for the step guide. 

 

 

Regards



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If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"! This will help the rest of the Community with similar issues identify the verified solution and benefit from it.

tejusuchil
What's DOS?
Posts: 4
Registered: ‎09-20-2014
Location: United States
Views: 230
Message 5 of 5

Re: z50-70 boot hang after BIOS update

Hello, the problem continues to this day. 

Although I found something very specific which may be a root cause of this error. 

The laptop ran fine for a few weeks when no drivers were installed on the stock windows 8.1.

Then I began installing a few of the mandatory drivers such as chipset, wifi, sound, BT and touch pad and it performed without any boot hang for quite a few months. 

Next I installed the Intel Rapid Storage Driver and the patch which came along with the driver volume for my laptop and the very next boot, the laptop hung on boot. 

So now I am back to running it without IRST and it works fine.

What ways does IRST and the patch help the laptop?

 

 

 

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