Your question

Laptop screen won't turn on, but works with external monitor.

Tags:
  • External Monitor
  • Function Keys
  • Laptop Screen
  • Windows 8
  • Asus
  • Displays
Last response: in Laptop General Discussion
October 9, 2014 9:42:26 PM

Hello, my laptop screen won't display anything. It boots up and displays perfectly through an hdmi and my T.V.. I can't adjust my screen brightness either, nothing comes up when I use the brightness function keys, the other function keys work fine. I went to device manager and everything under Monitor and Human Interface are updated. Under Monitor the device is Generic PnP. I'm on an Asus laptop, Windows 8, 64 bit. I'd appreciate any advice.

More about : laptop screen turn works external monitor

October 9, 2014 9:55:21 PM

have you tried using the display function key, varies by manufactuer. you may have a dead monitor otherwise.
m
0
l
a b * Windows 8
a b Ĉ ASUS
October 9, 2014 9:56:09 PM

normaly means dead back light. try turning it on and shining a bright light into the screen if theres an image there the backligt is gone.

if not then its likely the connector between the screen and the motherboard. they tend to break at the bazel.
m
0
l
Related resources
October 12, 2014 10:14:42 AM

diabedo said:
have you tried using the display function key, varies by manufactuer. you may have a dead monitor otherwise.


Yea I did, it's f7 for me and I also did Windows key P, tried dual monitor, single monitor and it always just shows up on my T.V. even when I do PC screen only. Thanks for getting back to me, I may have to just take it into a shop.
m
1
l
October 12, 2014 10:17:36 AM

HEXiT said:
normaly means dead back light. try turning it on and shining a bright light into the screen if theres an image there the backligt is gone.

if not then its likely the connector between the screen and the motherboard. they tend to break at the bazel.


I shone a light and nothing appeared. I just didn't think it would be a hardware issue since the laptops not even letting me use the brightness function, it's almost like the laptop doesn't recognize that there's a screen. Well I might just take it into a shop since it has no warranty. Thanks for getting back to me.
m
0
l
a b * Windows 8
a b Ĉ ASUS
October 16, 2014 5:07:25 AM

taking it back is the best option as it sounds like the connection between the screen and the motherboard has broken, cutting the power to the whole of the screen.

reason i said shine a light into the screen (i meant press it up against the screen and look for an image from the reflected light).
m
0
l
January 24, 2015 2:04:00 PM

Hi there! i had almost the same issue with asus laptop. i was experimenting things on it and after i assambled it back the screen won't turn on in a such way: after boot up i see a bios logo and then windows booting image. after that screen turns off. connecting external screen i assured that pc is fine and windows is working(except the screen). by the way screen is working in bios without connecting external screen. So actually i dont have any soluting now, because i dont know the reason of failure, but i know that something wrong is in windows(i have the same windows 8 and 64 bit). And it's simple to check: first get to bios(you can go into it with external screen and then just unplug that -> if laptop screen turns on then smth wrong is in windows), second boot up from usb flash drive with live cd(i booted from ubuntu) -> it perfectly worked without any issues.
m
0
l
March 20, 2015 6:21:50 PM

I had the same exact problem. After tring everithing, including driver reinstal and system restores, I shut down the laptop and surrender, thinking about how much a new screen will cost me BUT after a couple of hours, I just turn it on, and everything works as usual.

My theory: that was a busy day, I had the laptop working for 12 hours, so maybe something overheated. Just let your laptop rest in a fresh place for a while and try again.
m
0
l
April 16, 2015 4:01:45 AM

Charger760 said:
Hello, my laptop screen won't display anything. It boots up and displays perfectly through an hdmi and my T.V.. I can't adjust my screen brightness either, nothing comes up when I use the brightness function keys, the other function keys work fine. I went to device manager and everything under Monitor and Human Interface are updated. Under Monitor the device is Generic PnP. I'm on an Asus laptop, Windows 8, 64 bit. I'd appreciate any advice.




Had this same issue with a Lenovo T420 laptop; I cracked the screen and when I used the VGA cable to connect to an external monitor it just showed black.

REASONS: The monitor will display the Windows (or OS) logo until it boots into the OS because during the boot the motherboard displays output to the second monitor however once the OS is loaded the computer switches to Extended Display allowing the user to use both monitors (If they both worked)

SOLUTION
: I was able to get the laptop to display only to the monitor when connected by:
1. Turn off computer completely
2. Connect the VGA cable to the laptop (output) and monitor (input)
3. Power on laptop and Immediately close the cover of the laptop completely shut

RESOLUTION: By doing these steps the BIOS will boot recognizing the monitor as the main and only output option allowing
the monitor to continue to work even after loading the OS (ie. Windows 8)
The laptop will be completely closed therefore you will need a usb or bluetooth keyboard and mouse in order to perform operations going forward


hope this helps
- CG
m
0
l
September 3, 2015 3:13:32 PM

Hi, I have a dell latitude E6420. It has the same blank screen problem but with working hdmi function. When i use the brightne
m
0
l
September 30, 2015 12:58:25 PM

AMDnNVIDIAgamer said:
Charger760 said:
Hello, my laptop screen won't display anything. It boots up and displays perfectly through an hdmi and my T.V.. I can't adjust my screen brightness either, nothing comes up when I use the brightness function keys, the other function keys work fine. I went to device manager and everything under Monitor and Human Interface are updated. Under Monitor the device is Generic PnP. I'm on an Asus laptop, Windows 8, 64 bit. I'd appreciate any advice.




Had this same issue with a Lenovo T420 laptop; I cracked the screen and when I used the VGA cable to connect to an external monitor it just showed black.

REASONS: The monitor will display the Windows (or OS) logo until it boots into the OS because during the boot the motherboard displays output to the second monitor however once the OS is loaded the computer switches to Extended Display allowing the user to use both monitors (If they both worked)

SOLUTION
: I was able to get the laptop to display only to the monitor when connected by:
1. Turn off computer completely
2. Connect the VGA cable to the laptop (output) and monitor (input)
3. Power on laptop and Immediately close the cover of the laptop completely shut

RESOLUTION: By doing these steps the BIOS will boot recognizing the monitor as the main and only output option allowing
the monitor to continue to work even after loading the OS (ie. Windows 8)
The laptop will be completely closed therefore you will need a usb or bluetooth keyboard and mouse in order to perform operations going forward


hope this helps
- CG


m
0
l
September 30, 2015 12:59:49 PM

Thank you so much, CG!!! It worked!! Thank you, Thank you, Thank you!
m
0
l
October 16, 2015 7:08:34 PM

Gracias!!
funciono perfectamente en Dell E4300 con windows 10

Solo puse a funcionar el monitor con VGA y luego cerré el laptop inmediatamente
y listo funcionaron los dos!, no mas pantalla negra!!
m
0
l
January 1, 2016 7:24:10 PM

Charger760 said:
Hello, my laptop screen won't display anything. It boots up and displays perfectly through an hdmi and my T.V.. I can't adjust my screen brightness either, nothing comes up when I use the brightness function keys, the other function keys work fine. I went to device manager and everything under Monitor and Human Interface are updated. Under Monitor the device is Generic PnP. I'm on an Asus laptop, Windows 8, 64 bit. I'd appreciate any advice.


m
0
l
January 1, 2016 7:24:50 PM

hey charger760, did you ever find the solution to your problem
m
0
l
January 24, 2016 3:02:15 AM

please_answer_this said:
hey charger760, did you ever find the solution to your problem

I have same problem with ASUS s400c some time after updating to Windows 10.
Bios and safemode can use laptop display, but during normal boot Bios logo moves from laptop to external hdmi or vga. The external monitor is primary display but extending it to other display in laptop does not turn it on. dxdiag shows both monitors as working. All drivers are updated but I guess next step is to reinstall windows 10 :-/
m
0
l
March 4, 2016 10:35:09 AM

Charger760 said:
Hello, my laptop screen won't display anything. It boots up and displays perfectly through an hdmi and my T.V.. I can't adjust my screen brightness either, nothing comes up when I use the brightness function keys, the other function keys work fine. I went to device manager and everything under Monitor and Human Interface are updated. Under Monitor the device is Generic PnP. I'm on an Asus laptop, Windows 8, 64 bit. I'd appreciate any advice.


m
0
l
a b * Windows 8
a b Ĉ ASUS
March 4, 2016 11:58:30 AM

I had the same thing happen. It worked on an external monitor but not on the laptop. I didn't do the shining the light test but I assumed it was the back light. It turned out to be the LCD cable. I got it back and the colors were all messed up and I was about to send it back and turned it on and it was back to working and has worked for 4 years since.
m
0
l
March 13, 2016 12:29:06 AM

I learned that my customer's Intel HD3000 video chipset has issues upgrading.
It does better upgrading from 7 to 8 to 8.1 to 10, reportedly if you need full video capability.

If you need a quick fix, the solution was to go into device manager, right click teh display driver (Intel HD3000 in my case) and select "disable"
This makes Win 10 grab generic drivers.

This restored function to the laptop screen.
m
0
l
July 25, 2016 3:06:57 AM

AMDnNVIDIAgamer said:
Charger760 said:
Hello, my laptop screen won't display anything. It boots up and displays perfectly through an hdmi and my T.V.. I can't adjust my screen brightness either, nothing comes up when I use the brightness function keys, the other function keys work fine. I went to device manager and everything under Monitor and Human Interface are updated. Under Monitor the device is Generic PnP. I'm on an Asus laptop, Windows 8, 64 bit. I'd appreciate any advice.




Had this same issue with a Lenovo T420 laptop; I cracked the screen and when I used the VGA cable to connect to an external monitor it just showed black.

REASONS: The monitor will display the Windows (or OS) logo until it boots into the OS because during the boot the motherboard displays output to the second monitor however once the OS is loaded the computer switches to Extended Display allowing the user to use both monitors (If they both worked)

SOLUTION
: I was able to get the laptop to display only to the monitor when connected by:
1. Turn off computer completely
2. Connect the VGA cable to the laptop (output) and monitor (input)
3. Power on laptop and Immediately close the cover of the laptop completely shut

RESOLUTION: By doing these steps the BIOS will boot recognizing the monitor as the main and only output option allowing
the monitor to continue to work even after loading the OS (ie. Windows 8)
The laptop will be completely closed therefore you will need a usb or bluetooth keyboard and mouse in order to perform operations going forward


hope this helps
- CG


Toottoot4 said:
AMDnNVIDIAgamer said:
Charger760 said:
Hello, my laptop screen won't display anything. It boots up and displays perfectly through an hdmi and my T.V.. I can't adjust my screen brightness either, nothing comes up when I use the brightness function keys, the other function keys work fine. I went to device manager and everything under Monitor and Human Interface are updated. Under Monitor the device is Generic PnP. I'm on an Asus laptop, Windows 8, 64 bit. I'd appreciate any advice.




Had this same issue with a Lenovo T420 laptop; I cracked the screen and when I used the VGA cable to connect to an external monitor it just showed black.

REASONS: The monitor will display the Windows (or OS) logo until it boots into the OS because during the boot the motherboard displays output to the second monitor however once the OS is loaded the computer switches to Extended Display allowing the user to use both monitors (If they both worked)

SOLUTION
: I was able to get the laptop to display only to the monitor when connected by:
1. Turn off computer completely
2. Connect the VGA cable to the laptop (output) and monitor (input)
3. Power on laptop and Immediately close the cover of the laptop completely shut

RESOLUTION: By doing these steps the BIOS will boot recognizing the monitor as the main and only output option allowing
the monitor to continue to work even after loading the OS (ie. Windows 8)
The laptop will be completely closed therefore you will need a usb or bluetooth keyboard and mouse in order to perform operations going forward


hope this helps
- CG




Hello and thanks for your help but sadly this fix only works once, when im on the i cant always have my monitor with me. When i try to restart without vga the screen is black again
m
0
l
August 12, 2016 12:15:39 PM

Whenever you have a blackscreen, and before you get all that "Change the screen, change the BIOS, Change this or that..

If your latop gets into windows on a monitor screen, means there is nothing wrong with the BIOS or anything related to that. so try this first.

1.If your laptop has a removable Battery- remove it

2. Unplug the laptop

3.Hold the power button for at least 10 and up to 30 seconds so the laptop can get rid of any "on hold power or static"

4.Plug the computer in

5. Power up the laptop.

You may get back your screen... if it didnt work. try this:

1.Put the battery back

2. Turn on the computer and let it stay until battery die...

3..Hold the power button for at least 10 and up to 30 seconds so the laptop can get rid of any "on hold power or static"

4. wait 3-5 seconds

5. plug the computer and try to turn it on.

if any of this didnt work... try using the laptop with a monitor and check for drivers updates. on some windows 8 and 10 the graphic card get disabled and change to default intel graphics.

so update that.

If that still didnt work... it may be the screen is dead..


With the first solutions i have fixed several HP, Dell and my own Alienware M17x (July 2013 version with windows 7)


m
1
l
a b * Windows 8
a b Ĉ ASUS
August 12, 2016 12:21:05 PM

Charger760 said:
Hello, my laptop screen won't display anything. It boots up and displays perfectly through an hdmi and my T.V.. I can't adjust my screen brightness either, nothing comes up when I use the brightness function keys, the other function keys work fine. I went to device manager and everything under Monitor and Human Interface are updated. Under Monitor the device is Generic PnP. I'm on an Asus laptop, Windows 8, 64 bit. I'd appreciate any advice.


Typically if it works on an external source it's not the graphics card and it's the internal screen, screen components or cable. I had that happened and it turned out to be the LCD cable.

m
0
l
September 19, 2016 12:11:41 AM

AMDnNVIDIAgamer said:
Charger760 said:
Hello, my laptop screen won't display anything. It boots up and displays perfectly through an hdmi and my T.V.. I can't adjust my screen brightness either, nothing comes up when I use the brightness function keys, the other function keys work fine. I went to device manager and everything under Monitor and Human Interface are updated. Under Monitor the device is Generic PnP. I'm on an Asus laptop, Windows 8, 64 bit. I'd appreciate any advice.




Had this same issue with a Lenovo T420 laptop; I cracked the screen and when I used the VGA cable to connect to an external monitor it just showed black.

REASONS: The monitor will display the Windows (or OS) logo until it boots into the OS because during the boot the motherboard displays output to the second monitor however once the OS is loaded the computer switches to Extended Display allowing the user to use both monitors (If they both worked)

SOLUTION
: I was able to get the laptop to display only to the monitor when connected by:
1. Turn off computer completely
2. Connect the VGA cable to the laptop (output) and monitor (input)
3. Power on laptop and Immediately close the cover of the laptop completely shut

RESOLUTION: By doing these steps the BIOS will boot recognizing the monitor as the main and only output option allowing
the monitor to continue to work even after loading the OS (ie. Windows 8)
The laptop will be completely closed therefore you will need a usb or bluetooth keyboard and mouse in order to perform operations going forward


hope this helps
- CG
how long will it take to solve the problem ? by the way iam doing it right now .
m
0
l
September 19, 2016 12:13:09 AM

AMDnNVIDIAgamer said:
Charger760 said:
Hello, my laptop screen won't display anything. It boots up and displays perfectly through an hdmi and my T.V.. I can't adjust my screen brightness either, nothing comes up when I use the brightness function keys, the other function keys work fine. I went to device manager and everything under Monitor and Human Interface are updated. Under Monitor the device is Generic PnP. I'm on an Asus laptop, Windows 8, 64 bit. I'd appreciate any advice.




Had this same issue with a Lenovo T420 laptop; I cracked the screen and when I used the VGA cable to connect to an external monitor it just showed black.

REASONS: The monitor will display the Windows (or OS) logo until it boots into the OS because during the boot the motherboard displays output to the second monitor however once the OS is loaded the computer switches to Extended Display allowing the user to use both monitors (If they both worked)

SOLUTION
: I was able to get the laptop to display only to the monitor when connected by:
1. Turn off computer completely
2. Connect the VGA cable to the laptop (output) and monitor (input)
3. Power on laptop and Immediately close the cover of the laptop completely shut

RESOLUTION: By doing these steps the BIOS will boot recognizing the monitor as the main and only output option allowing
the monitor to continue to work even after loading the OS (ie. Windows 8)
The laptop will be completely closed therefore you will need a usb or bluetooth keyboard and mouse in order to perform operations going forward


hope this helps
- CG
how long will it take to solve the problem by the way I am doing it right now

m
0
l
November 10, 2016 12:32:12 PM

I woke up to Windows 10 having installed a new security update, and my laptop screen wouldn't display anything except for a few seconds of startup (BIOS) no matter if my external display was connected or not. Luckily my external display worked, so I was able to troubleshoot, the external display was the #1 display, there was no hint of my laptop screen in the device manager, but since I know it installed the update I went into the Windows Update History and just uninstalled kb3200970, about 5 minutes later after a restart and "installing updates" yada yada it worked perfectly again. The update details didn't mention anything about changes to displays so it's kind of odd, but the bottom line is my screen works again.
m
1
l
December 21, 2016 4:53:49 PM

Garrett_36 said:
I woke up to Windows 10 having installed a new security update, and my laptop screen wouldn't display anything except for a few seconds of startup (BIOS) no matter if my external display was connected or not. Luckily my external display worked, so I was able to troubleshoot, the external display was the #1 display, there was no hint of my laptop screen in the device manager, but since I know it installed the update I went into the Windows Update History and just uninstalled kb3200970, about 5 minutes later after a restart and "installing updates" yada yada it worked perfectly again. The update details didn't mention anything about changes to displays so it's kind of odd, but the bottom line is my screen works again.


This is what happened to me too - a security update failed to install, but seemed to intall anyway. I removed the last fewvwindows updates from Programs And Features and rebooted and all was well.
m
0
l
December 21, 2016 6:47:30 PM

Glen_20 said:
Garrett_36 said:
I woke up to Windows 10 having installed a new security update, and my laptop screen wouldn't display anything except for a few seconds of startup (BIOS) no matter if my external display was connected or not. Luckily my external display worked, so I was able to troubleshoot, the external display was the #1 display, there was no hint of my laptop screen in the device manager, but since I know it installed the update I went into the Windows Update History and just uninstalled kb3200970, about 5 minutes later after a restart and "installing updates" yada yada it worked perfectly again. The update details didn't mention anything about changes to displays so it's kind of odd, but the bottom line is my screen works again.


This is what happened to me too - a security update failed to install, but seemed to intall anyway. I removed the last fewvwindows updates from Programs And Features and rebooted and all was well.


Watch out. Mine automatically re-installed the update each night, so for the next 2 days the same problem popped up, despite installing a special Microsoft utility to prevent installing those updates. About the 3rd or 4th time, it installed the update but didn't cause the problem again. So who knows...
m
0
l
February 22, 2017 3:13:35 PM

I had a similar problem on a Lenovo Yoga 900 running Windows 10. One day the built-in laptop screen was not recognized, and displayed nothing, even on start-up. Yet an external monitor did work, and showed as the only detected display. Oddly, the laptop touchscreen remained receptive, and it controlled output on the external! There had been no recent updates to roll-back. I tried all manner of restarting, disabling/enabling devices, & updates to drivers, but nothing. I was about to try a BIOS update, when my wife suggested rebooting in safe mode. Voila! It worked. The screen is back. No idea what the problem was. Any ideas?
m
0
l
July 11, 2017 8:09:00 AM

Zeroram said:
Whenever you have a blackscreen, and before you get all that "Change the screen, change the BIOS, Change this or that..

If your latop gets into windows on a monitor screen, means there is nothing wrong with the BIOS or anything related to that. so try this first.

1.If your laptop has a removable Battery- remove it

2. Unplug the laptop

3.Hold the power button for at least 10 and up to 30 seconds so the laptop can get rid of any "on hold power or static"

4.Plug the computer in

5. Power up the laptop.

You may get back your screen... if it didnt work. try this:

1.Put the battery back

2. Turn on the computer and let it stay until battery die...

3..Hold the power button for at least 10 and up to 30 seconds so the laptop can get rid of any "on hold power or static"

4. wait 3-5 seconds

5. plug the computer and try to turn it on.

if any of this didnt work... try using the laptop with a monitor and check for drivers updates. on some windows 8 and 10 the graphic card get disabled and change to default intel graphics.

so update that.

If that still didnt work... it may be the screen is dead..


With the first solutions i have fixed several HP, Dell and my own Alienware M17x (July 2013 version with windows 7)







Thank You So much, it really helped me :) 

Thanks a lot :-)

i removed battery for some time and then long pressed power button for 10-15 sec and connected Battery Charger, started again restarted then pressed power button until the beep sound beeps and then it will switch on then again shut down leave for some time and then again start.

just for the other guys who are looking for this issue.

"Lenovo ideaPad S510P Series"
m
0
l
August 27, 2017 3:45:41 PM

This might be old but for anyone having this problem ( like i did) go into display settings and click on the 1st screen go down to muliple displays and hit extend desktop to this display.
m
1
l
Tom’s guide in the world
  • Germany
  • France
  • Italy
  • Ireland
  • UK
Follow Tom’s guide
Subscribe to our newsletter
  • add to twitter
  • add to facebook
  • ajouter un flux RSS