If the monitor does not turn on
Employees of service centers are oftenthe question is asked why the monitor does not turn on. Most often, the situation is as follows: a person presses the power button of the system unit, the cooling fans start to work, and the screen of the monitor remains black.
If the monitor does not turn on, then one of the mostprobable causes are problems in the section "motherboard - video card - image output device". They should be checked first. Every computer owner knows that when the power is turned on, his silicon friend emits a joyful squeak with an internal speaker. This sound symbolizes the successful passage of all self-tests. Its absence may indicate a malfunction of the motherboard or the CPU. But if instead of a single "beep" a series of intermittent sounds is being issued, this indicates problems with other components - memory, controllers, a video card.
But if the squeak at power-up sounds likeusually, but the screen does not display anything, then the range of possible causes is narrowed. It is possible that the video adapter unit responsible for the transfer of the image failed. And since the processor itself is functional, the self-test is successful.
- make sure that the card-monitor cable is nowhere damaged, and in the connectors is fixed securely with the provided screws;
- the LED of the monitor is lit. If it does not light, you need to check the power supply (plug, power cord) and turn it on by pressing the button. The display itself very rarely fails.
And the last problem, which although it seemsamusing, causes a whole barrage of calls to the masters. The fact is that almost all modern monitors have several outputs: D-SUB, DVI, HDMI, etc. You can select the priority one in the monitor menu. If there is a mismatch between the "main" and the really connected output, the screen will not show anything.
But when the monitor does not turn on the laptop, everything is a little more complicated. You can recommend trying to press a special key combination that includes a screen on mobile computers.