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10 Posts

04-19-2021

India

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Y540-15IRH-PG0 black screen after bios downgrade

2021-04-19, 7:27 AM

I tried downgrading to older bios from bhcn41ww to bhcn27ww because of heating issues, everything was smooth, the bios flashed. but when it automatically restarted, it got stuck on black screen ( like screen is dead). I can't get into bios settings, i tried novo option to get into bios. but nothing happens. It only shows a light on the power button. Btw backlight works when I press "fn+ spacebar". 

 

I tried the guide to flash BIOS from USB, but there is no beep. and it just stops and stuck with a light on the power button.

 

My laptop model : Legion y540

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4457 Posts

04-23-2019

United States of America

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Re:Y540-15IRH-PG0 black screen after bios downgrade

2021-04-19, 12:39 PM

Hello @primearts,

 

Welcome to the Community Forums.

 

You could try attempting to reset the BIOS by removing the CMOS battery.

However if this does not work it could be because once an upgrade has been done to the BIOS new features are added to it. If it is downgraded the machine will most likely brick due to the new features no longer being present. I would suggest reaching out to a service center for assistance with getting this repaired.

 

You can use this link to find a service center near you: https://support.lenovo.com/us/en/partnerlocator

 

Hope this helps.
Regards,
Jack_Lenovo1



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10 Posts

04-19-2021

India

413 Signins

295 Page Views

  • Posts: 10
  • Registered: ‎04-19-2021
  • Location: India
  • Views: 295
  • Message 3 of 5

Re:Y540-15IRH-PG0 black screen after bios downgrade

2021-04-19, 15:45 PM

There is no nearest service centre of lenovo in my area, is there any other way like could i reflash the bios using the crisis recovery method also the bios which i flashed was the stock one which came with the laptop. What are the signs of a bricked laptop?

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4457 Posts

04-23-2019

United States of America

671 Signins

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  • Message 4 of 5

Re:Y540-15IRH-PG0 black screen after bios downgrade

2021-04-20, 15:16 PM

Hello @primearts,

 

Thanks for writing back.

 

A machine that is bricked will usually have no display or just a black display.

You will also be unable to load the BIOS which is another sign of bricking.

 

I would suggest reaching out to service at 1800-419-7555.

https://www.lenovo.com/in/en/contact

 

Regards,

Jack_Lenovo1



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18 Posts

04-05-2020

United States of America

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Re:Y540-15IRH-PG0 black screen after bios downgrade

2021-04-20, 19:18 PM

41 to lower version downgrade is deadly. lenovo must be responsible for this. to solve, refer https://forums.lenovo.com/t5/Gaming-Laptops/Legion-Y740-no-boot-no-bios-no-logo-after-bios-backflash-to-1-08/m-p/5065455?page=3

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