Monitor Does Not Start When Power On

If the monitor does not turn on when the computer starts, the reasons may be different. Not only beginners, but also experienced users may find themselves in a state of stupor, having fallen into a similar situation. What to do? How to identify the source of the malfunction and eliminate it?

Monitor Does Not Start When Power On

The monitor is not to blame!

No matter how strange it may sound, but in 9 cases out of 10, the screen has nothing to do with breakage. It continues to work, the power button may blink, as if the device is in standby mode. But the image does not appear on the display; instead, the inscription “No Signal” is visible. This indicates that no data is coming from the system unit.

What do you need to do first? Be sure to check the connection. One of the ends of the VGA / DVI / HDMI cable may have dropped out of the socket. Or maybe someone intentionally decided to hurt you and pulled out the cord. Alas, this also happens.

The following are other common reasons why the monitor does not turn on when the computer starts:

  • The PC power supply is damaged (it does not work at all or its voltage is not enough to meet the needs of the system);
  • Malfunctioning RAM;
  • The adapter is out of order (contact clogging is also possible);
  • The chipset was “covered”. A rare situation and very sad;
  • The problem is really in the monitor.
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This is all good, of course, but I’m sure you are more interested in specific steps to eliminate the defect. Here you need to pay special attention to detail, because you have to accurately identify the source. And any signals that the computer will send will help in this. Now let’s move on to a detailed analysis of the solutions.


Diagnosis and “treatment”

The fact is that there are situations when the system does not start immediately, but for a long time “thinks”. But then (after 2-3 minutes) a picture appears on the screen, the download continues. Therefore, it makes sense to wait a bit. If on the screen it says “There is no signal” and nothing happens within a few minutes, you should go to active actions.

You do not need to immediately remove the housing cover and look for a breakdown with your eyes. You must first narrow down the “circle of suspects”:

  • You can exclude the monitor from the list of reasons in a simple way: connect it to another “system”, a laptop. If the image appears, then we continue to search for a malfunction inside the PC.
  • Press the power button on the system unit. Have you heard the characteristic squeak that was before during normal PC startup? If there was nothing, it means a problem, definitely, inside the computer.
  • Check the cable through which the hard drive connects to the chipset. Both ends should fit snugly into the slots. At the same time, look at the power cable connected to the HDD.
  • Pay attention to the noise of the fan installed on the power supply. Is he present or not? If only silence, no hum. then BP is not working. But there is another, very commonplace reason: someone disconnected the power cable from the network or pulled it out of the computer. If there is a power button on the back of the case, it is also worth checking.
  • If your motherboard has an integrated graphics card, try connecting to it. Suddenly the monitor “comes to life”, which means that the defect is associated with a discrete adapter. You should remove the cover and see if the cooler rotates on it (if there is one). Perhaps the board is a little off or the contacts are dirty. gently pull it out of the slot, clean the contacts with cotton moistened with alcohol (or with an ordinary eraser). Did not help? So the graphics card needs repair / replacement.
  • Often, the monitor blinks or does not work during computer startup due to the RAM slots installed on the motherboard. Maybe one of them “burned out” or a little left, the contacts got clogged. You need to pull it out, try to swap the strips, clean them with an eraser, as is the case with the card (see above).
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I am sure that you were able to identify and eliminate the trouble. Is the monitor working? Share your story in the comments. If the steps listed in the instructions did not help, it is likely that you will have to carry the computer to the service, since you are dealing with a hardware malfunction. At home, without a special tool and experience, it is better not to take any action.