If the computer squeaks when turned on

About why the computer when turning on peeps, is described in numerous thematic forums, however, as often happens, really interested in the reasons for this behavior begin only when there are any failures. This is the psychology of man. Prior to this, the question of why the computer is squeaking when turned on, only curious users are interested. Part of this is correct, especially if we take into account the fact that squeaking from the system unit is quite a rare occurrence. But first things first.

How the electronic heart beats

Even at the time of the appearance of the first IBM-compatible computers, it became obvious to developers and users that computers simply need some mechanism that signals the state of the component blocks and systems in one way or another-a kind of diagnostic module that reports on malfunctions. To understand what exactly is needed, let's consider two situations, in the first of which the computer is equipped with the mentioned mechanism, but in the second one there is not.

So, the user presses the power button, the fans start spinning, the hard drive spins up - at first glance, no problems. However, before the operating system loads, it does not come to pass: several audio signals are heard (speaker-speaker squeaks), and the screen remains dark. Since the sounds are repeated, then, by determining the alternation of short and long, you can, by the appropriate table, find out why the computer squeaks when turned on and what needs to be done to restore its operability. Suppose that one long and two short signals alternate. This indicates a malfunction of the video subsystem. Therefore, the reason is not in the monitor, as one might think, but, most likely, in a discrete video card. So, you need to test it. Quite often, such a malfunction is caused by a trivial violation of the contacts in the connector and can easily be eliminated by removing the video adapter and reconnecting.

But if the computer does not lighten when the computer is turned on, the user will eventually get a system unit with a dark monitor fanning the cooling system . To determine the cause of this failure, you will have to alternately replace the key components with known good ones, naturally expecting that the defective component will be found in this way. Obviously, not all computer owners have a warehouse with spare parts for checking.

How it is implemented

This diagnostic mechanism is quite simple: the BIOS BIOS not only configures the operating parameters of all internal components when turned on, but also polls their status. If everything is normal, then the computer will beeping when turned on once and continues to boot the operating system. In addition to audio signals, LEDs on the board, an alphanumeric display and even a voice message can be used as an indicator.

Why the computer squeaks when turned on

So, a sound signal is needed for a general fault finding. Depending on the modification of the firmware version of BIOS, the decoding of sounds differs. So, they differ from Award, AMI and Phoenix (appearance of modern UEFI even more confused situation). Recall that the system speaker should always be connected to the motherboard.