Why does not the computer turn on?

Each owner of an electronic computing system must be mentally prepared for the fact that periodically it is necessary to solve quite specific tasks. For example, understand why the computer does not turn on. And not just have theoretical knowledge, but also be able to independently repair the failure, if, of course, this is possible. Usually this malfunction is manifested as follows: after turning on the power and pressing the power button, the computer does not turn on (the black screen of the monitor is the evidence). This is exactly what we are talking about today. Just note that you should not rush to repair shops, as the cause of the malfunction may be banal, and the payment of work is very tangible.

Line start

Does not turn on the computer? Black screen? Do not panic! First you need to check the power status of the system unit. Most computers now connect to the network using a "Pilot" extension cable, and the fact of the power supply is monitored by the glowing signal light on it. However, due to the design features of some models, there may be a situation where power is not supplied to the device. The solution is simple: switch the plug of the system cord to another connector. Possessing repair skills, you can later restore the extension by performing an internal revision.

The next reason why the computer does not turn on is the loose contact at the place where the cord plug is connected to the system unit. It is necessary to remove the cord and reconnect it, you can also try to connect the appropriate wire from the monitor to the system monitor (they are usually identical).

Cooling

Many motherboards have a logic mechanism that interrupts the power supply in the absence of signals from the cooling system fans. So, everyone who has ever wondered why the computer does not turn on knows that it is necessary to open the case cover and make sure that the fan blades (especially the processor blades) rotate, and not blocked by perennial dust. In other words, it is necessary to clean the components of the system unit from contamination.

Button

One of the commonplace reasons why the computer does not turn on is the malfunction of the button on the case itself. When it is pressed inside, the two contacts short-circuit close, giving the command to supply power to the motherboard. Their bending due to excessive exposure or contamination with dust leads to a breakdown of this kind. The solution is simple: you need to open the system case, find a block labeled Power (PWR), disconnect the corresponding connector from the button and close the two pins on the board with a screwdriver. In fact, thus the operation of the button will be duplicated. If the computer turns on, then you need to repair or change the Power button.

Board contact violation

For the correct operation of most modern motherboards, two voltage lines are needed: the main one by means of a wide connector-comb, and also by an additional four-pin connector. Sometimes when assembling a system unit, the auxiliary is simply forgotten, because of which the computer does not react to pressing the power button. It is necessary to check the correct connection of all connectors to the board according to the instructions.

And, of course, the possibility of damaging the power supply unit or any other component is not ruled out. In this case, you need to contact a specialist for assistance.