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Super2015
Paper Tape
Posts: 3
Registered: ‎05-17-2017
Location: PH
Views: 4,246
Message 1 of 11

Lenovo Y50-70 turns on but has black screen

Hello everyone. I plugged the HDMI to the laptop, watched a movie,turned it off and slept afterwards. The problem is when I turned it on, the power seems to work and also the keyboard lights up but the monitor won't. What would be the solution to this problem?

Sr Support Specialist
Posts: 7,602
Registered: ‎11-30-2015
Location: PH
Views: 4,219
Message 2 of 11

Re: Lenovo Y50-70 turns on but has black screen

Hi Super2015 ,

 

Welcome to the Community Forums. 

 

About screen blank state (page25) :

If the time set on the “Turn off monitor” timer in the operating system expires, the LCD backlight turns off. You can also turn off the LCD backlight by pressing Fn + F2. To end screen blank state and resume normal operation, press any key. 

 

Try pressing FN + F2 again , else FN + F3 to opens the interface for selecting display options to change. 

 

If pressing any key would not work , manually shutdown the pc and unplug any connected cables . 

Press the Novo button (item 14 page 82) to power on the machine. Check to see any display on the laptop screen.

 

Update us how it goes.

 

Regards



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Super2015
Paper Tape
Posts: 3
Registered: ‎05-17-2017
Location: PH
Views: 4,203
Message 3 of 11

Re: Lenovo Y50-70 turns on but has black screen

Hey! Thanks for the tips but unfortunately all of them doesn't work. I tried pressing the button beside the power button(novo key) but also failed. I'll try to reconnect the HDMI cable later to see if it works. Appreciate the effort though.

Sr Support Specialist
Posts: 7,602
Registered: ‎11-30-2015
Location: PH
Views: 4,193
Message 4 of 11

Re: Lenovo Y50-70 turns on but has black screen

Hi Super2015 , 

 

When you attempt to turn on the laptop , will pressing the caps lock respond with the LED?

Any Windows sounds audible in the background?

Would there be anything dimmed onscreen when you use a penlight ?

 

We appreciate any update soon asthe HDMI cable is available and try to apply FN + F2 / FN + F3. 

 

Regards



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Super2015
Paper Tape
Posts: 3
Registered: ‎05-17-2017
Location: PH
Views: 4,186
Message 5 of 11

Re: Lenovo Y50-70 turns on but has black screen

Sorry for the late reply. I tried connecting the HDMI cable and pressing the FN+F2/F3 but nothing works. No Windows startup sound. Just plain black screen. The only thing difference I can see is when I turned it back on, the keyboard lights flash a bit. Before this happened, I often let my laptop stay up all night(downloading some games), do you think it caused this?

Sr Support Specialist
Posts: 7,602
Registered: ‎11-30-2015
Location: PH
Views: 4,180
Message 6 of 11

Re: Lenovo Y50-70 turns on but has black screen

Hi Super2015 , 

 

Would anything seen onscreen when illuminated by a pen light ? 

Will pressing the caps lock respond? 

 

Best to check your warranty as this maybe a no post issue and have it brought to the service center.

Update us how things go.

 

Regards

 



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Koni5560
Paper Tape
Posts: 4
Registered: ‎03-30-2018
Location: CA
Views: 3,457
Message 7 of 11

Re: Lenovo Y50-70 turns on but has black screen

Hey, I had the same problem and I ended up having a corrupt BIOS. I posted this as an answer on another thread, but I figure if others come looking it will help

I just recovered/reflashed my bios today. Everything works like a charm

I went through everything. I pulled the batteries, and held the power button. I cycled my power and put in ram sticks, I pulled my display and check if it worked on another laptop's LVDS connector, I Heat gunned my GPU. Literally everything.

Here are the steps:

 

1. Get a BIOS file.  Here is a link https://forums.lenovo.com/t5/Lenovo-P-Y-and-Z-series/Y50-Bios-3-03-problem/td-p/2178818
The third post down has different versions. I used V1.14. The latest version from the lenovo website has no .ROM file, so I guess it's not an option.

2. Open the file with 7zip. You'll have to download it by googling, it's free. Open the downloaded BIOS file (Should be called "9ecn31ww" by right clicking, going down to 7-zip => Open Archive.
Extract the file named WINZIVY2X64.ROM to a folder of your choice. Perhaps the desktop.  The file will be 9 908 160 (bytes) in size. DO NOT FLASH A FILE THAT HAS A DIFFERENT FILE SIZE.

 

3. Part of the process requires your BIOS file to be correctly named in order for it to properly recover/flash. In this step we're going to rename the files to every possible combination of BIOS filenames.
Getting these names is a difficult proccess, that I honestly know nothing about.

Get Notepad++, it's also free. 
Open WINZIVY2X64.ROM with Notepad++(regular Notepad does not work for this part, believe me I tried,it will simply save the names as WINZIVY2X64.BIN.ROM, same as using just the windows rename feature)


Now select 'Save As' and save it as the following: (Repeat the process for each file name. You should be getting several files each with a different name as you save more copies in the folder where you initially placed WINZIVY2X64.ROM)

WINZIVY2X64.BI

WINZIVY2X64.BIN

WINZIVY2X64.FD

WINZIVY2X64.ROM

WINZIVY2X64.WPH

ZIVY2.BI

ZIVY2.BIN

ZIVY2.FD

ZIVY2.ROM

ZIVY2.WPH

 

(This last set seems unlikely to be the correct names to me, but I saw someone else claim they used it, and it was on my USB drive when it worked so who knows?)

ZAVY2.BI

ZAVY2.BIN

ZAVY2.FD

ZAVY2.ROM

ZAVY2.WPH

4. Take a USB flash drive, go to "My computer" Right click on the USB drive and select Format. Change the filesystem from NTFS to FAT32. Format the drive.
The flash drive does not need to be a 'bootable' flash drive. Leave it as is.


5. Copy all the files from step 3 to the flash drive.

 

6. Unplug your laptop from the AC adapter. 
Disconnect the battery from the motherboard. 
With everything disconnected hold the power button for 20-30 seconds. This purges residual power from the board.
Disconnect the hard drive (This ensures that the USB flash drive is read first. I'm not sure if this is necessary, but it was the case when my flash worked)

7. Plug in your USB flash drive into any USB port.
8.HOLD Fn+B
9.While HOLDING Fn+B, plug in the AC adapter.
10. While still HOLDING Fn+B press the Power Button.

11. You should hear the fans turn on very loudly, no display, and no keyboard lights.
Let go of Fn+B after a few seconds
You should hear a rather loud series of beeps. This is the BIOS being flashed. Let it beep repeatedly as long as it needs to. When the process is done, the beeping will stop, and the laptop will turn itself off. It may also reboot.

If all went well, you're screen should now be working just fine. Put everything back together and help others out if they have the same problem. Feel free to ask me questions.

I also have to mention this part, because I firmly believe it was instrumental in my success:
While doing the process, I prayed like I never have before. And I mean prayed. To God. I've had it happen far too many times, where I've prayed and literally right then things started working, for me to think it's an accident. I feel like I'd be letting God down if I didn't bother letting others know that he helped. And I promised that if it worked, I would post my guide on the web. Not trying to convert anyone, or be weirdly religious, just doing what I think is right.

elgarra
What's DOS?
Posts: 1
Registered: ‎10-09-2018
Location: ES
Views: 1,411
Message 8 of 11

Re: Lenovo Y50-70 turns on but has black screen

I have registered only to thank you for your post.

I followed step by step your post and it worked.

 

 

BeachLasania
Paper Tape
Posts: 2
Registered: ‎11-06-2018
Location: US
Views: 901
Message 9 of 11

Re: Lenovo Y50-70 turns on but has black screen

Seconding (or is it thirding?) that this worked for me as well.  I had my screen seemingly fail to turn on even though the fans, keyboard backlight, etc all worked when the power button was pressed.  Wasn't able to get a television to recognize my laptop via a HDMI cable.  All of the other fixes listed above failed for me.  Followed these directions and presto, I'm typing this from my Y50-70.  You have my thanks.

matrix1999
What's DOS?
Posts: 2
Registered: ‎11-19-2018
Location: US
Views: 635
Message 10 of 11

Re: Lenovo Y50-70 turns on but has black screen

Hi there, I don't normally join the forum but I had to just because I want to send you a big kudos for your detailed instructions. I very much appreciated for your help.

I took every step you have suggested except the part where duplicating the BIOS filenames. Instead of using Wordpad++, I simply opened Windows' File Explorer, navigate to where I extracted the BIOS file, select the file, press CTRL-C and then CTRL-V to make a copy of the file, and then renaming them to what you have listed.

Thanks so much once again. I was so worried that my laptop was broken and worst is worried about the files lost.

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