Pishtit when turning on the laptop: the causes of failure and their removal

If you have a whine when turning on the laptop, the reasons for this may be different. We will try to understand them. Computer equipment is often subjected to various breakdowns. The fact is that the laptop consists of a large number of subsystems that are interconnected, but their elements are not super-strong and durable.

A task

If the laptop does not boot, it is important to determine the cause of this situation. The equipment developers provided this. A special mechanism was created, which allows to determine the cause of the failure and localize it. It just consists in the special signals issued by the computer. So, if some sounds are heard from the laptop, this is good news, indicating that the device is not finally out of order. If the laptop does not turn on, it's too early to panic. Almost any damage can be eliminated. Certain malfunctions can be eliminated on their own, others require the involvement of a master.

Input device

If you have a whine when turning on the laptop, the most common reason for this is the keystoning. It is caused by clogging or spilled liquid. As a result, the contact closes. It can be considered a good option if the moisture remains exclusively on the keyboard, not penetrating the case. In the latter version, the problems that have arisen can be much more serious.

Temperature

If the laptop does not boot, the reason for this may be hidden in the cooling system. Its clogging with debris or dust, as well as mechanical damage caused by blows when the device falls, is the cause of the CPU overheating. If the cooling system is used for thermal extraction from a graphics card, it can also become unusable.

RAM

If you have a whine when turning on the laptop, the reason for this may be hidden in the damage to the RAM. As a rule, in such cases it is a violation of the contact between RAM and the motherboard. To less common reasons for the appearance of extraneous sounds when turning on, you can include improper settings in the BIOS, the failure of the motherboard.

What does the signal mean?

If you squeal when turning on the laptop, there may be several reasons. The sound is produced by a small tweeter. It is located on the motherboard. He is called a speaker. The device looks like a small barrel. Its main purpose is to signal faults. In the published sound there is information describing the nature of the breakdown. If you know the manufacturer of BIOS, as well as determine the tone of the squeak and the duration, it is easy to find out which component is in need of repair. To find out information about the BIOS, you can use the documents to the device.

Display

Often besides the sound signal , the screen on the laptop also does not work. This should be discussed in more detail. First of all, we check the power settings during operation from the battery and the network. Set the brightness of the screen. If the screen on the laptop does not work, we also check that in all positions of the cover it is not active. The fact is that in case of damage to the loop of the matrix, the display can display information only under certain conditions. In particular, this applies to the position of the lid. In addition, if a black screen appears on the laptop, it should be connected to an external monitor. We check whether the image is displayed on it. If this is the case, the loop or matrix may be faulty. If the image is missing, the most likely failure is the hardware, especially the video card. At startup, the operating system can be booted. In this case, the fault lies exactly in the video card. When there is obviously a lack of a boot process - the indicator responsible for the operation of the hard disk does not respond, the problem is in other components. The problem can also be with the power button. It is able to stop responding to clicks. As a rule, this is caused by contamination.

Less common faults

If you see only the black screen on the laptop, but the operating system can be downloaded, you should carefully look at the display, and light it with a lamp. If you can see the picture, but there is no backlight, the lamp or inverter is faulty. These elements are responsible for the constant illumination of the screen. If there is a breakdown in the inverter, it can both be repaired and replaced. It all depends on the severity of the breakdown. The backlight is not subject to recovery, only replacement. If the display is black on the sides and shows almost nothing, it's likely that the reason lies in the hardware failure of the laptop. 60% of the cases are broken video chip. It occurs because of overheating. 10% - no contact between the power supply unit and the memory module. In this case, a thorough check of the device is necessary. In 10% of cases, the southern bridge breaks down. Another 20% are problems of a different kind. To find and fix them, you need to diagnose the device. Most often, the matrix of the screen remains unaffected. Its damage is possible with mechanical damage or liquid on the screen.

Signal varieties

With the display figured out, and now back to the sounds released by the laptop. Each signal carries information about the cause of the malfunction. The decoding of the sound may vary depending on the manufacturer of the BIOS. Consider them in order. The quotation marks the sequence of signals.

Let's start with the devices from the company DELL. The signal "1-2" indicates a malfunction in the video card. The "1-2-2-3" sound indicates an error in the BIOS permanent memory. If you hear a combination of "1-3-1-1", the problem relates to updating the DRAM. When a keyboard error occurs, the signal "1-3-1-3" sounds. The code "1-3-3-1" indicates an error in the memory. Sound signals of the type "1-3-4-1", "1-3-4-3" and "1-4-1-1" indicate different breakages, but all of them are related to the problems in the RAM.

Now we will discuss the AMI BIOS. 1 short signal indicates no errors and working condition of the laptop. 3 long sounds refer to the RAM and indicate that the read and write test was completed with error detection. The memory element must be reinstalled. 1 long and 1 short signal indicate problems with food. If you turn on the laptop 8 times, it's a video card error. If you hear 1 long and 8 short beeps, the monitor may not be connected. Also in this case we can talk about problems with the video card. 10 short signals indicate a write error in the CMOS. Continuous sound can be caused by a power failure. Also, overheating of the processor is likely.

1 long sound in combination with 4 short sounds about the absence of a video card. If there is no signal at all, it is most likely that the processor is malfunctioning. 1 long sound and 3 short talk about the video card error. The problem is with the EGA-VGA system. 2 short signals most often speak of a parity error of RAM. A similar sound can occur if you do not turn off the printer or scanner. 4 short signals indicate a malfunction of the system timer. In this case, you need to replace the motherboard. 11 short signals indicate a cache error. It is located on the motherboard. 1 long signal in combination with 2 short signals indicates a video card error. This is a failure of Mono-CGA.