Why does not the computer turn on?

Each owner of electronic computingsystem must be morally 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 to have theoreticalknowledge, 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 the repair shops, as the cause of the malfunction may be banal, and the payment of work is very tangible.

Line start

Does the computer turn on? 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 somemodels there can be a situation when the electric power is not fed to the device. The solution is simple: switch the plug of the system cord to another connector. Possessing repair skills, you can subsequently restore the extension by performing an internal revision.

Следующей причиной того, почему не включается computer, there may be a loose contact in 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 logicalmechanism, interrupting 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 cover of the case and make sure that the fan blades (especially the processor blades) rotate, and not blocked by long-term dust.

In other words, it is necessary to clean the components of the system unit from contamination.

Button

One of the commonplace reasons whythe computer turns on, consists of the failure of the button on the body 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.

Breach of contact on the board

For the correct operation of most modernmotherboards require the supply of two voltage lines: the main one by means of a wide connector-comb, as well as an additional one using a four-pin plug. 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 some other component is not ruled out. In this case, you need to contact a specialist for assistance.