Each user may have difficulty with turning on the computer. Not always this problem is associated with its failure.
Often the reason for everything can be the user himself, or rather, his careless attitude towards his own computer.
If the computer does not turn on but emits whileSound signals, the problem can immediately be determined. The computer has a built-in audio buzzer, which notifies the user of possible problems. Depending on the type of BIOS installed on the PC, the signals indicate the following problems:
AMI Bios - 2, 3 or 4 short signals are notifiedAbout memory problems, 5 short signals indicate a processor failure, 1 long and 3 short signals are the forerunners of the faulty video card.
Phoenix BIOS - 1 long and 3 short signals indicate a malfunction or lack of a video card, long and repetitive signals indicate a memory problem.
Why the computer does not turn on
The reasons for the problems can be several, here are the main ones:
- problems with voltage 220V-
- the CMOS-
- faulty power supply-
- dustiness of the
- malfunction of the motherboard.
Problems with voltage
It's worth checking if the power goes to the outletOr the network filter to which the computer is connected. You can connect a luminaire or mobile phone there. Perhaps the power supply is overloaded, and then you need to disconnect the extra electrical appliances. If these actions do not work, then it is necessary to check whether all cables and power cords of the computer are tightly connected, and also to check the power button on the PC.
If the voltage is normal, immediately worth itPay attention to the computer power supply. If there is no serviceable unit at hand, you can check the voltage of the installed one. For this, a conventional electric tester is used. When the power is on, the voltage between the wires of the power supply unit is measured. Between any yellow and black wire should be 12V, between red and black 5V. Deviations of 5-7% are allowed. If the indicators are more or less, then the power supply must be changed.
If the computer is more than 3 years old, the so-called sticking process can be observed. Then you need to leave the computer for 10-15 minutes without power, and then try to turn it on.
The motherboard has a smallLithium battery. It supports non-volatile memory in which all the BIOS settings are stored. The battery starts to set when the computer is turned off, or when errors occur during startup. The battery is easy to replace, it is sold in any computer store.
Perhaps a lot of dust accumulated inside the computer. Then it must be de-energized, and then cleaned with a vacuum cleaner and a small brush. Particular attention should be paid to the video card, memory slots and coolers.
If after all the manipulations the computer has notHas started, maybe the problem lies in the components, cables or motherboard. In this case, you will have to call a specialist or take the computer to a service center.