Find the reason why the monitor does not turn on, sometimes it's difficult, because the processes involved in displaying the image on the screen are interrelated and are in completely different parts of the computer. There are several common problems that can arise in this situation.
Why does not the monitor turn on?
To decide what to do, if the monitor does not turn on and correct the situation, you need to determine the cause of the problem. Disappearing images associated:
- With the failure of the device itself.
- Defective motherboard, video adapter, connecting cables.
- Incorrect installation of drivers.
- Wrong setting of the video system parameters.
When you turn on the computer, the monitor does not turn on.
If the monitor does not turn on when you start the computer , you first need to make sure the device is working - to see if the Power button on the panel is pressed and whether the indicator is lit. Sometimes users turn off the display and forget about it, and the next time they work, they think that the device has broken down. To test the working capacity of the monitor is not difficult:
- It is necessary to disconnect its cord from the system and leave only a cable for 220 V.
- Press the "Power" button.
- At the working device, the bulb should glow, not blinking, and the "No Signal" entry appears on the screen.
The monitor does not turn on - the light blinks
If the indicator is flashing - the monitor is in the standby mode, the power cord and the signal transmission cord are connected correctly (otherwise the message would be displayed), the power supply of the monitor also works correctly. Problems with such symptoms can be several - video card, motherboard settings, or the board itself. Sometimes you can observe a similar failure in the case of memory problems, when the contact with one of its slats periodically disappears.
The monitor does not turn on - the indicator
If the monitor does not turn on and does not output "No signal", do the following:
- Press the power button - it's probably off.
- Make sure that the device is plugged into the outlet. To test it itself - to try to feed through it, for example, a lamp.
- Check the power cable, try another one.
- If the indicator still does not glow, the monitor must be carried to the service center - it is definitely broken.
Monitor squeaks and does not turn on
The monitor does not squeak ever and does not signal so about accidents and malfunctions - only the system unit squeaks. If the squeak comes from the monitor - the road is just for service. Any squeak warns of a problem:
- It happens that the computer itself squeaks, and the monitor does not turn on. So the system warns that there are failures in the hardware, often in the video adapter. He is advised to get it, clean it from dust and re-insert it tightly. If this does not help, you should connect it to a working PC and test if the display is functioning, connect another tested video card to the computer for testing. If it's not a video adapter, there's nothing left to do but replace the motherboard or RAM. The display itself is easy to test, connecting it to a working PC.
- If the monitor itself emits a low-pitched high-frequency squeak, most likely, it has problems in the power supply unit or the lamp backlight inverter, such repairs are made only in the workshop.
After sleep mode, the monitor does not turn on
Unpleasant situations when the monitor goes into sleep mode and does not turn on when you press any button on the keyboard. The problem is often software:
- Incorrect settings for hibernation or hibernation mode, incorrect versions of video adapter drivers are installed, you need to update them to new ones.
- Often, the monitor does not turn on after sleep mode when the Windows system is corrupted. You need to make it rollback, or completely reinstall this operating system.
The monitor turns on, but does not show
If the computer turns on and the monitor still does not work and displays a black screen, it is advisable to try resetting the BIOS settings. It is necessary to turn off the system unit, open its cover. On the motherboard you need to find a round flat battery that feeds the BIOS, pull it out for a couple of minutes and then insert it into place. Often this method helps, if the computer and the display are working, but the screen at turn-on still remains dark.
Another reason for not viewing the image is a malfunction of the LCD in the backlight portion. Option two (in both cases for repairs you need to contact the service):
- The failure of the voltage inverter board, responsible for supplying voltage to the backlight lamps.
- The lamps of illumination themselves went out of order: if one or several lamps fail, the display automatics disables the illumination and the image on it is practically invisible, but it is there and is poorly visible.
The monitor goes off and does not turn on.
When during work after a while goes out and after the monitor does not turn on, there can be several reasons. But they are all related to the failure of elements that are prone to natural heating when the computer is running:
- Defective graphics card . This fault can easily be detected by connecting the monitor to another computer, and it will function flawlessly. Then either the video adapter is defective or it overheats from heavily demanding applications and poor cooling of the radiator.
- Broken memory modules . You can check RAM modules using standard Windows tools. If they function with errors, you can try to clean the strap contacts with a normal eraser or try to replace the modules.
- Hardware display malfunction . In general, the elements of the power supply unit of the monitor during operation are subject to strong heating, in the displays that have served for more than one year there may be a lot of defects due to constant thermal impact.
The monitor does not turn on immediately
If the monitor does not turn on for a long time when the computer starts up, or the picture appears slowly, a little flickering, the fault is most probably in the hardware of the monitor itself, the defect will progress and the monitor will soon fail completely. Shortly before a complete breakdown, the monitor may spontaneously turn off, publish a strange characteristic squeak or smell of plaited plastic. If the monitor does not pass to the service immediately, then after a full failure, the cost of repair will increase several times, or even it will not be subject to recovery at all.
The monitor does not turn on the first time
Users note that the display may not light up at the first attempt. When asked why the monitor does not turn on right away, experts respond that the breakdown is most likely in the power supply of the monitor. It is required to be handed over for repair immediately, as soon as a problem has arisen - it will be disassembled and replaced by swollen electrolytic capacitors. With the LCD backlight inverter, too, there are similar problems - at home, such repairs are extremely undesirable.
The new monitor does not turn on
If you do not turn on the power of the monitor that you just purchased, the difficulty may be due to the following:
- The cable is not connected correctly. The modern video adapters have built in several connectors, which connect the display - white DVI, blue VGA, the newest - HDMI. For normal connection, the correct cord must be inserted into the corresponding connector carefully, until the input is completely in the grooves. The shape of the socket will tell you how to connect them. After that, twist the two screws clockwise.
- Often monitors with multiple ports can receive a signal from only one of them. Use only a VGA or DVI connection.
- After connecting to the display via the menu, you need to reset the settings and make new equipment settings in the system.
The monitor on the laptop does not turn on
When the monitor of the stationary computer does not turn on, the reasons can be either with the connection of cables or with the functioning of the system. With the laptop is another story - in it the screen is connected to the hardware without external cords, and with the help of loops. What you need to do if the display remains dark:
- Reset settings: disconnect the laptop from charging, remove the battery from the laptop (if it is removable), reset the hardware settings, holding the power button for 20 seconds, insert the battery into place.
- To test the working order of the laptop screen: connect an external display to it , turn on the laptop, by several pressing the combination Fn + F8, try to select the screen broadcasting via the external display. If the picture on the external screen does not appear, then the problem lies in the video adapter of the laptop.
- In some cases, the dilemma with the lack of images can be solved by distorting the RAM slats. This solution is relevant if the device has been cleaned, stood in a damp premise or has not been used for a long time.
- If the monitor does not turn on after the sleep mode, then you need to rollback or reinstall the video adapter or chipset drivers - they should be the latest version and the operating system should be suitable. You can not prohibit waking the laptop from the mouse and the keyboard at the same time in the parameters - otherwise it will not work.
- If after such manipulations the black screen remains, it is necessary to apply for diagnostics to the service center. The following problems are possible:
- defect of the loop;
- failure of the backlight lamps or its inverter;
- Problems in the motherboard or video adapter.