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10-03-2016

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Lenovo y50 wont boot. Can't access bios, blank screen with leds working

2016-10-03, 20:12 PM

Hi. I have a lenovo y50 running windows 10. It did some automatic update, shut down and when I powered it up again, I got the update being prepared screen then after a while it rebooted and was stuck on the lenovo logo for a long time. I force shut it down and again it froze on the lenovo screen. After powering  it up again, i got a bsod and it again rebooted. Now,  when i power it on i dont get anything on the screen, its totally blank with the leds powering up and also the keyboard backlighting. Any help guys? 

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9995 Posts

11-30-2015

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Re: Lenovo y50 wont boot. Can't access bios, blank screen with leds working

2016-10-03, 20:35 PM

Hi nikar15 , 

 

Welcome to the Community Forums. 

 

Would you have the machine number? Check on the machine number from the sticker or check it from here ,just keep your serial number confidential.

Was it previously on Win8.1 ? Did you manage to create a recovery media ?

 

It would have to power drain the machine by removing the charger , battery and harddrive and to press and hold down the power for 12 seconds. 

 

Without the harddrive and battery , try going to the BIOS by FN + F2 or use the Novo button to start. If you manage to get the BIOS set up screen , go to the Exit Tab and load optimal defaults and save and exit. Turn off and put back the battery and harddrive and check.

 

Update us how things go. 

 

Regards



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12 Posts

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Re: Lenovo y50 wont boot. Can't access bios, blank screen with leds working

2016-10-03, 21:42 PM

Thanks for the prompt reply. 

-I'm guessing that the machine no. you're referring to is the mtm no.  which in my case is 59440640.

 

-Yes, my laptop was previously on win 8.1 but that has to be months ago. 

-No,  I don't have any recovery media. 

-Power drained it by opening  the cover and removing the battery and hdd cables from the mobo, disconnecting the charger and pressing the power button for an exact 12 seconds but still couldn't get into the bios neither with fn +f2 or with the novo button.( hdd and battery were disconnected and the laptop was plugged in)

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11-30-2015

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Re: Lenovo y50 wont boot. Can't access bios, blank screen with leds working

2016-10-03, 22:04 PM

Hi nikar15 , 

 

Would you have a screenshot/ video link on what would show up upon powering attempt to access BIOS without the harddrive and battery?

 

How was it if you try to boot from a live rescue image ?  

 

Regards



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Re: Lenovo y50 wont boot. Can't access bios, blank screen with leds working

2016-10-04, 21:05 PM

When I attempt to access bios without the hdd and the battery, the same happens i.e. blank screen with pwer status led on and red backlights on. If you want to see that I can click a photo. Also, If the laptop isn't going past even the POST, how will it boot a live rescue cd? Can you enlighten me on that please. Thanks. 

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9995 Posts

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Re: Lenovo y50 wont boot. Can't access bios, blank screen with leds working

2016-10-04, 21:21 PM

Hi nikar15 , 

 

Greetings. 

 

As noted earlier , LED indicators are working so basically isolating No POST against No Display /No Boot (fast boot) instead of just ruling out a bad board/BIOS which is easier to conclude.

 

Tracking the history of events that may have brought the current issue, would you think an OS update can break POST? 

 

Regards



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Re: Lenovo y50 wont boot. Can't access bios, blank screen with leds working

2016-10-04, 21:37 PM

I really don't know what happened. If the board or the bios had gone bad what symptoms would the laptop show? Would they be any different than the ones on mine? Also, should I try any bios recovery method? 

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281 Posts

08-27-2016

GR

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Re: Lenovo y50 wont boot. Can't access bios, blank screen with leds working

2016-10-04, 22:12 PM
Theres a chance your RAM has gone bad. Try to boot with only one module, if black screen, then reseat the first one and remove the second one and try to boot again

I am a volunteer in this forum and also a lenovo user. If i helped you, click on the kudos button!

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12 Posts

10-03-2016

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Re: Lenovo y50 wont boot. Can't access bios, blank screen with leds working

2016-10-04, 22:23 PM

Mine had a single 8gb stick and I used it in another laptop to confirm that it was alright. Could it be anything else? Thanks for the help. 

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281 Posts

08-27-2016

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Re: Lenovo y50 wont boot. Can't access bios, blank screen with leds working

2016-10-04, 22:37 PM

It could be a couple of things like:

 

  • Bad memory
  • A capacitor gone bad
  • Motherboard failure
  • CPU or GPU that needs to be reflowed

As a last thing try to remove the bios battery for 30minutes so that everything is reset. If that doesn't help i would advise you to take it to a specialist for a hardware diagnosis

I am a volunteer in this forum and also a lenovo user. If i helped you, click on the kudos button!

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