User question
Hello.
Tell me how can I solve the problem with Lenovo laptop. During Windows startup (after the logo appeared), the screen has recently started to go blank (you can hear from the sound that the OS has booted).
What to do to turn on the screen, or just in the service? It all started after the laptop was connected to a large TV screen. Didn't something burn out?
Thank you in advance.
Dear day!
I must say that this problem is quite common. This can happen both due to software reasons (software malfunctions, incorrect settings, etc.), and due to hardware problems. From experience, I immediately notice that in most cases the problem is in the software.
Judging by your question and its description, you have incorrect screen settings - i.e. the laptop "thinks" that it is still connected to the additional screen and transmits a picture to it. Let's try to fix it now! ..
👉 To help!
By the way, if you have any artifacts on the screen (stripes, ripples, etc.), I recommend that you familiarize yourself with this article.
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Why the screen goes blank: the main reasons
Screen Settings (About the Projector)
When connecting a laptop to a TV (for example) or to any other add. monitor - you go to the screen settings and set the display option:
- show the picture both on the laptop monitor and on the screen;
- show the picture only on the laptop screen;
- show only on the TV screen, etc.
But after disconnecting the laptop from the additional screen, it does not always "know" about it and can continue to broadcast the picture to the disconnected monitor, and turn off its own ... A kind of mini-software failure ...
To adjust the screen and select a projector, you can:
but) for Windows 7: go to the control panel at the following address:
Control Panel \ Hardware and Sound \ Display
Next, select the link on the left - "Connect to Projector" (if the screen is off, you are unlikely to find this setting by touch. However, you can enter safe mode, in most cases everything works in it);
Connect Projector / Windows 7
b) for Windows 8/10: Press the WIN + P buttons at the same time, then the down arrow and Enter. If it does not help, WIN + P again, 2 times the down arrow and again Enter.
Project - To Computer Screen Only
By the way, when you press WIN + P - a small window appears with a choice of 4 display options:
- only a computer;
- duplicate;
- expand;
- just a projector.
When you press the up / down arrow, you change the set mode. By the way, if you select the last option and press Enter, then your screen will go out (curious - they can try ☝).
Selecting a display option
👉 IMPORTANT!
On some laptop models - the screen can be turned off using special function keys.
For example, in Acer notebooks, you can use the key combination "Fn + F6".
Keyboard shortcuts are usually always listed in the documentation that came with your laptop.
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Power settings
Also, the screen goes blank quite often due to power settings (note: most often this happens during periods of inactivity, when you leave your laptop / PC).
To check your power settings - open 👉 Windows Control Panel, then section "Hardware and Sound" , further section "Power supply" (see screenshot below).
Power supply
In this section, you should see several power supply plans (balanced, economical, efficient, + additional options are possible) - open the settings of your the current plan (see screen below).
Selected mode
Next, you will see the setting "Turn off display" : next to this line there will be two different periods of time, depending on whether the laptop is running on battery or mains. Just set more minutes and save the parameters.
How long does it take to turn off the display
Please also note that some laptop models (for example, Lenovo, Sony, etc.) may have special additional power control applications (installed along with the drivers). Here to give recommendations, how and what is difficult, tk. there can be a lot of software options.
As a rule, to open such a panel (as in the screenshot below), just look at the icons in the tray, if you have such a manager, you should find the icon there!
Lenovo - Smart Power Management
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Video driver problem
If the drivers "flew" to the video card, then more often than not, the screen changes the resolution (everything becomes large on it, the window borders are not visible, etc.), in some cases the colors, brightness, etc. are distorted.
Quite rarely, but this happens, the picture disappears altogether, and the computer must be booted 👉 in safe mode to install the driver.
Because the description of the problematic of drivers is a rather large topic, then below I will give links to my previous articles, which dealt with the issues of finding and updating drivers.
👉 To help!
How to enter safe mode - //ocomp.info/kak-zayti-v-bez-rezh-windows.html
This article comes in handy if you don't know (or are having difficulty) how to enter Safe Mode. It is in it that you can completely remove the old driver and install a new one.
👉 To help!
List of the best driver update programs - //ocomp.info/update-drivers.html
A great article that lists the best programs for automatically finding and updating drivers. It will be enough for you to install the program and press 1 button - then the program will do everything on its own for you!
👉 To help!
1) How to install drivers on a computer, laptop - //ocomp.info/kak-ustanovit-drayvera-na-kompyuter-noutbuk.html
2) How to remove video driver AMD, nVidia, Intel - clean and complete - //ocomp.info/udalenie-videodrayvera.html
Often a new driver is not installed until you delete the old one. And removing a driver is not always easy, specials are often required. utilities for this business. The article tells you how and what to use ...
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Infecting a laptop with virus software
Of course, you can expect a lot from viruses: damage to files, and formatting the disk, and sending virus messages, including a "game" with the screen: shutting down, twisting, changing the brightness, etc.
True, such viruses are very rare. Nevertheless, I cannot but recommend checking the laptop with a modern antivirus with updated databases ...
👉 To help!
For a list of the best antiviruses - see my selection ->
The article lists the best antiviruses of the current year. You can choose any of them, after installing it - update its anti-virus database and scan your computer completely!
👉 To help!
How to remove viruses from your computer if the antivirus does not see them - //ocomp.info/esli-antivirus-ne-vidit-virusov.html
Not all types of viruses can be found and recognized by the classic antivirus. If he didn't find anything, use the recommendations from this article.
👉 One more moment!
Recently, it is not classic viruses that have caused much more problems, but adware that is embedded in everything that is possible: in Windows, in browsers, etc.
It happens that such applications purposefully show you a large banner, and so that you click on it, they try to change the screen resolution so that only this banner is visible. As a result, an error occurs (for example, a conflict with the video driver), and the screen goes blank.
👉 To help!
This small note will help you to check and remove such adware from your PC: //ocomp.info/kak-udalit-virus-iz-brauzera.html
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Overheating, dust cleaning
If the ventilation holes and the overall cooling system of your laptop are clogged with dust, then the laptop may simply turn off if it overheats.
By the way, in some laptops (for example, in a number of models from ASUS), when the screen overheats, various flickers appear, or even the screen goes blank.
In general, it is advisable to clean any laptop from dust 1-2 times a year (depending on the conditions in which the device operates).
Some laptops are quite easy to disassemble, and for cleaning it is enough to remove the back cover and carefully blow through everything; other models - to get to the radiator,you will have to "gut the whole" device (which I do not advise people without experience to do).
I described my recommendations and advice in one of my previous articles, the link below.
👉 To help!
How to clean a laptop from dust - by yourself at home
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PS
1) If the above measures did not help, you can try the Windows recovery option - //ocomp.info/vosstanovlenie-windows-10.html (if, of course, you have checkpoints and they were created when everything was working in normal mode) ...
2) Still, as one option, I can recommend booting the laptop from the emergency LiveCD - this will allow you to understand if the screen shutdown is related to crashes in Windows.
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That's all for now, add-ons on the topic - always come in handy!
Happy work!
👋
First published: 03.09.2017
Correction: 01/30/2020
