If you have a squeak when you turn on the laptop, the reasons for this may be different. We will try to figure them out. Computer equipment is often subjected to various breakdowns. The fact is that a laptop consists of a large number of subsystems that are interconnected, but their elements are not heavy-duty and durable.
Task
If the laptop does not load, it is important to determine the cause of this situation. Hardware developers have foreseen this. A special mechanism was created to determine the cause of the breakdown and localize it. It just lies in the special signals issued by the computer. So, if you hear any sounds from the laptop, this is good news, indicating that the device is inconclusive. If the
laptop does not turn on, it is too early to panic. Almost any damage can be fixed. Certain malfunctions can be fixed on their own, for others it will be necessary to involve a wizard.
Input device
If you have a squeak when you turn on the laptop, the most common reason for this is the key sinking. It is caused by clogging or spilled liquid. As a result, contact closure occurs. It can be considered a good option if moisture remains exclusively on the keyboard without penetrating the case. In the latter case, the problems that have arisen can be much more serious.
Temperature
If the laptop does not boot, the reason for this may lie in the cooling system. Its clogging with debris or dust, as well as mechanical damage caused by shock when the device falls, cause the CPU to overheat. If the cooling system is used for heat removal from the graphics card, it is also capable of deteriorating.
RAM
If you have a squeak when you turn on the laptop, the reason for this may lie in the damage to RAM. As a rule, in such cases we are talking about the violation of the contact between RAM and the motherboard. The less common reasons for the appearance of extraneous sounds when turned on include incorrect settings in the BIOS, failure of the motherboard.
What does the signal mean?
If you squeak when you turn on the laptop, there may be several reasons. The sound comes from 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 fault reporting. There is information in the sound that describes the nature of the breakdown. If you know the BIOS manufacturer, as well as determine the tone of the squeak and the duration, it is easy to find out which component needs repair. To find out about the BIOS, you can use the documents for the device.
Display
Often, in addition to 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 mains. Set the screen brightness. If the screen does not work on the laptop, we also check whether it is inactive in all positions of the cover. 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 relates to the position of the lid. In addition, if a black screen appears on the laptop, it should be connected to an external monitor. Check if the image is displayed on it. If so, most likely the loop or matrix is faulty. If the image is missing, the most likely damage to the hardware, especially the video card. When turned on, the operating system may be heard loading. In this case, the malfunction is precisely covered in the video card. When the absence of the boot process is obvious - the indicator responsible for the hard drive is not responding, the problem is in other components. The problem may be with the power button. She is able to stop responding to clicks. This is usually caused by pollution.
Less common malfunctions
If only a black screen is visible on the laptop, but the operating system is audible, you should carefully look at the display and shine a lamp on it. If you can see the image, but there is no backlight, then 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 be either repaired or replaced. It all depends on the severity of the breakdown. The backlight cannot be restored, only replaced. If the display has turned black on the sides and shows almost nothing, most likely the reason lies in the breakdown of the hardware of the laptop. 60% of cases are a video chip breakdown. It occurs due to overheating. 10% - lack of contact between the power supply and the memory module. In this case, a thorough check of the device is necessary. In 10% of cases, the south bridge fails . Another 20% are problems of a different kind. To find and eliminate them, device diagnostics is required. Most often, the matrix of the screen remains operational. Its damage is possible due to mechanical damage or liquid splashing on the screen.
Varieties of signal
We figured out the display, and now back to the sounds made by the laptop. Each signal carries information about the cause of the malfunction. Sound decoding may vary depending on the BIOS manufacturer. Let's consider them in order. The quotation mark will indicate the sequence of signals.
Let's start with DELL devices. The signal "1-2" indicates a malfunction in the video card. The sound “1-2-2-3” reports an error in the read-only memory of the BIOS system. If you hear the “1-3-1-1” combination, the problem is with DRAM. When a keyboard error occurs, the signal “1-3-1-3” sounds. The code “1-3-3-1” indicates an error in memory. Sound signals of the type “1-3-4-1”, “1-3-4-3” and “1-4-1-1” indicate various breakdowns, however, they are all associated with malfunctions in the RAM.
Now discuss the AMI BIOS. 1 short signal indicates the absence of errors and the good condition of the laptop. 3 long beeps 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 beep indicate a power problem. If when you turn on the laptop, it beeps 8 times, we are talking about a video card memory 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 may be caused by a power failure. CPU overheating is also likely.
1 long sound in combination with 4 short ones indicates the absence of a video card. If there is no signal at all, most likely it is a processor malfunction. 1 long sound and 3 short sounds indicate a video card error. The problem applies to the EGA-VGA system. 2 short signals most often indicate a RAM parity error. A similar sound may occur if you do not turn off the printer or scanner. 4 short beeps 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. It's about a Mono-CGA crash.