What to do if the laptop screen is black when you turn it on, but the light bulb is on and the cooler works?
In this article we will talk about such an unpleasant symptom for any laptop as a black screen when turning on. And the light bulbs may burn and even the cooler will spin. But there will be no image on the screen.
Now you will learn what to do when getting into this situation, to try to bring your laptop back to life on your own at home.
Power settings in Windows 7
So, you have a Windows 7 operating system and your monitor screen goes out quickly, whether it’s a laptop or a desktop computer?!
Go to the Power Supply section. To do this, simply right-click on the power icon on the Taskbar (as shown in the screenshot below) and select Power Options from the context menu that appears:
If you don’t see the Power Plan icon on the Taskbar, then left-click on the small triangle icon (to the left of the Power Plan icon in the picture) and look for the Power Plan icon.
You can also access Power Supply in another way.
Start Menu. Control Panel:
Next, select System and Security:
So, whether we have entered the Power Plan through the Taskbar or through the Start menu, now in the selected power plan we click on the link with its settings:
And here we can adjust the settings the way we want:
How much time to dim the display (monitor) or turn it off, so that it completely fades, as well as when to put the computer into hibernation mode and adjust the brightness of the screen.
And for a notebook you can also set it separately: From battery or From mains.
And, of course, once you change the settings, you need to save them for them to take effect:
So, if you have a monitor (laptop) screen dims quite quickly, try here to increase the time in the appropriate settings (when to dim and turn off the display).
Since we “got” in these settings, it may be interesting for someone to dig into the additional settings:
But, it already does not concern a raised theme, therefore I shall leave for independent mastering, the more so, as there all enough intuitively clear.
The reason. drivers / BIOS
It is very often the case that a particular driver can be unstable. For example, a video card driver can cause your notebook screen to go blank or the image to be distorted. I personally witnessed how, because of the video card drivers, some of the colors on the screen became dim. After their reinstallation. the problem disappeared!
It is better to download drivers from the official site. Here is a link to the off. sites of the most popular laptop manufacturers.
Also I recommend to look at the article about finding drivers (the last method in the article helped me a lot).
The BIOS might be the reason. Try to visit the manufacturer’s web-site and see if there are any updates for your device model. If there is. it is recommended to install (how to update BIOS).
Accordingly, if your screen began to go out after updating the BIOS. then roll it back to an older version. When upgrading, you probably did a backup.
If the LEDs light up, the laptop is noisy, but there is no image on the screen
- the first thing I recommend to connect your laptop to the external display and see if there will be an image on it. If so. the problem is probably related to the laptop monitor, if not. then most likely there is a problem with the video card or matrix. by the device card. About how to connect an external monitor to your laptop;
Screen backlight burned out. the image can only be seen when the table lamp is lit on the monitor surface
Asus laptop. Turn the screen off (function key)
Note the option Graphic Device Settings (allows you to turn off the discrete card and work only on the built-in);
Why does the notebook screen turn off?
From the problem you sent me, you can see why the black screen turned on. The reason why the notebook screen turned off was because another screen was turned on that may have been physically disconnected.
So, I recommended in normal mode (when the screen is dark, t.е. disabled) press the combination: Windows P (English) icon, then right arrow and Enter.
This combination helped to re-enable the notebook screen. Therefore, if you, too, faced with a similar situation, I give visually this process of turning on the laptop screen.
If there is no display off button on the keyboard?
In this case you can do the following. Set the notebook display to turn off automatically after one minute if no key is pressed or the mouse is moved.
To do this, regardless of the version of Windows, right-click on the battery level icon in the lower right corner next to the clock, and in the menu that opens select “Power”.
A window opens in which you select “Display Off Setting” on the upper left.
Then select “Turn off display” everywhere and select 1 min. Or another required time after which the notebook screen will automatically turn off without pressing any keyboard keys or moving/mouse clicks.
Set the time after which the screen turns off by itself
The notebook, however, will work and perform the actions assigned to it.
To turn the display back on just press any button or move the mouse.
If all of the above did not give results. probably the laptop need to be diagnosed on the hardware malfunction. For a general understanding of the “picture” in general, you can advise additional. the following:
- pay attention to when the problem occurs. For example, if you connect the charger while Windows is not booted. the display also turns off? Alternatively, you can try booting from the LiveCD and check this fine point;
- When the screen goes out. shine a flashlight on its surface. Can you see anything? (The point is that the display may have a damaged backlight. if so, this repair is usually “pennywise”. ) ;
The backlight of the screen burned out. the image can only be seen when the table lamp is lit on the monitor surface
In general, of course, if you’ve never equipment repair. then advise it to disassemble. I will not (all the more so that I myself can repair (resolder) only some not very complicated elements. And cases are different, and the diagnosis is not always so easy. ). Therefore, the last tip of the article in the service.
Why the screen goes out: the main reasons
When connecting the laptop to a TV (for example) or to any other add-on. to the monitor. you go into the screen settings and set the display option:
- to show the picture on both the laptop monitor and the screen;
- show a 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 a picture to the disconnected monitor, and his. turn off. A kind of mini-software glitch.
To adjust the screen and select the projector, you can:
a) for Windows 7: go to the control panel at the following address:
Control Panel/Equipment and Sound/Screen
Then select the link on the left. “Connect to the projector” (if the screen is out. you are unlikely to find this setting by touch. However, you can enter safe mode, in most cases it works);
b) for Windows 8/10: press WINP key simultaneously. then the down arrow and Enter. If that doesn’t work, WINP again. 2 times the down arrow and Enter again.
Project. only on the computer screen
By the way, when you press WINP. a small window appears with a choice of 4 display options:
When you press the up/down arrow. you change the set mode. By the way, if you choose the last option and press Enter. the screen will turn off (the curious can try ☝).
On some laptops. the screen can be turned off with special function keys.
For example, on Acer laptops, you can use the key combination “FnF6”.
The keyboard shortcuts are usually always listed in the documentation that came with your notebook.
To do this, you must connect a laptop computer via a supported interface to the imager.
For most people this is an obsolete VGA port, although many modern devices are not equipped with it.
In this case it has to be DVI or modern HDMI. For the user there is no difference, only the plugs and wires are different.
If a picture appears on your TV/monitor, the problem is in your display. defective backlight, problem with the flat cable.
In the latter case, it can be replaced yourself, but it is not always easy to find the right component, and even fewer people will be able to carefully and correctly unscrew the device, replace the old cable and put everything back. Yes so that you do not damage the notebook.
When you connect PC to TV and a picture appears on the latter, take your device to the service center.
Specialists will find the problem and offer a solution. Sometimes it can be expensive, such as replacing the screen matrix.
It is not uncommon for a device to shut down automatically when the temperature of one of its components reaches a limit set by the developer.
In this situation the culprit is most often the overheated CPU, which does not allow the computer to restart.
Cooling system can not cope with its tasks for a number of reasons:
The problem with the dust
The fan blades and heat sinks with the plates are covered by dust, which reduces the thermal conductivity of metal and the efficiency of heat dissipation from the heated power elements.
You have to take off the bottom cover of the device and get rid of the dust with a can of compressed air, cotton swabs (just do not leave lint) or vacuum cleaner with hair dryer.
If you are going to blow, it is better to take out the laptop on the street or balcony.
It is also recommended once every two years (each service center and the manufacturer to establish the terms independently) to replace terpoplastu, which is located on the contact pad between the CPU and cooler.
It is better not to change the thermal conductive paste at home, if you don’t have such experience. there are consequences.
Problem with Windows or drivers
When your PC starts you see a loading screen (it says which button is used to call BIOS), then you see the logo of Windows operating system you are starting and after it is loaded you see only the cursor, but you can open the Task Manager.
Try to run explorer manually:
- Open the Task Manager.
- Select Create new task in the File menu.
- In the text line of the window that appears write explorer and hit Enter.
Did not work? Let’s use Safe Mode. To access it, reboot and then press F8 for a few seconds. When a screen with a list of startup options appears, choose the appropriate one.
If it worked, search for application or driver that caused the problem (remember, what did you install or update before the problem appeared).
Often it helps to rollback the state of the system, reset it (if it is Windows 10) or reinstall.
The last thing you can try is to reset the BIOS.
This variant is more suitable for PC (may be the picture is displayed on the second device, not on the main monitor) not for PC, but it can help someone.
- After a couple of seconds, press F9 to reset the settings.
- Press F10 to exit the configuration menu.
- Press Enter to save the settings.
If that does not help, then in step 4 you need to press the cursor left or right to select the positive answer (in some models the default option is “No”).
Also make sure you press the right button to open the BIOS. The instruction manual of the device will help.