The laptop immediately goes into the BIOS. What should I do if the BIOS opens when I turn on my laptop or PC? Energy “CMOS problem” - the battery is dead

BIOS is the Basic Input/Output System, the heart of the computer, without which the normal operation of other components and software is impossible. When you turn on the computer, the BIOS starts first and only after it is turned on does the operating system begin to load.

Theoretically, since Windows boots after the BIOS, reinstalling the operating system or adding another OS should not affect the normal operation of the BIOS. However, there are often cases when an attempt to install a second operating system results in the BIOS not loading.

In this case, we can assume that the BIOS settings have gone wrong and restoring the default settings may solve the problem. To reset the settings, you need to perform the following operations.

1. Disconnect the PC and monitor from the electrical network.
2. Open the system unit and remove the battery from the motherboard.
3. Wait a few minutes.
4. Return the system battery to its place.
5. Connect power to the computer and monitor.

After restarting, the BIOS will start loading “like the first time”. If the problem goes away after this, it is recommended to format the boot hard drive and reinstall the operating system. Preferably one that has previously worked without problems. It is quite possible that the added operating system was damaged in the distribution.

Connection problems

There is a high probability that the BIOS does not load due to breaks in the power supply networks or data loops. To check this option, you first need to listen to see if the cooler on the motherboard is spinning. The BIOS is part of the processor and therefore poor cooling of the motherboard leads to malfunctions.

Perhaps the contact groups of the fan have come loose, which is why it does not work. After this, carefully inspect all cable and cable connections. Check to see if dust has accumulated on the motherboard or contacts. Dust is an excellent conductor of electric current, and it also creates electrostatic fields, to which electronics are very sensitive.

• Clean the device from dust using a vacuum cleaner and a brush.
• Sequentially disconnect the contactors and clean the terminals from dirt and oxidation. You can use a school eraser to clean the contacts.
• Check that all connectors are securely attached. It is likely that vibration caused the contacts to separate, and therefore the equipment stopped working correctly.

After the maintenance, you can try to start the computer again. The screen is black again and the BIOS won't load? Then we can assume that one of the internal modules is faulty. Including the motherboard itself could fail or need to be reflashed.

You can download the new firmware for the motherboard on the manufacturer’s official website. Updating the firmware is a difficult and quite risky task. Therefore, if you don’t know exactly what and how to do, it’s better not to take risks, otherwise you could ruin your entire computer, including the hard drives. It is better to contact the service center.

Faulty blocks in the computer

None of the above helped? Then the likelihood of hardware failure increases and you can start checking the blocks.
Disconnect and remove anything from the device that is not necessary for the computer to start. Leave only the motherboard, power supply and one of the RAM sticks. The computer will not work in this state, but it is possible to check the serviceability of the motherboard itself.
A common reason for the inability to start a computer is insufficient power from the power supply. For example, you replaced the motherboard with a more advanced one, which requires more electricity. At the same time, the power supply remains the old one. Or so - additional hard drives or some other functional components were installed in the system unit. Energy consumption can increase quite significantly. Installing a more powerful power supply will solve the problem. If the issue, of course, is a lack of energy.

Often, loading the BIOS is prevented by a malfunction in the video card. If possible, you need to check the video card by replacing it with another similar one. Or install the video card in another computer. Here you need to look at the compatibility of the equipment. Otherwise, you won’t find the problem, but you may create new problems.

If the minimum configuration - motherboard, power supply, RAM socket - the system unit is working and the BIOS is loading, then the problem is in one of the removed modules. After installing and connecting the next unit, try turning on the computer again and see what happens. As soon as the BIOS stops starting again, we can assume that you have discovered a faulty unit. Now all that remains is to find a similar one and replace it.

In reality, everything often turns out to be much more complicated. For example, the computer sometimes boots and works quite normally, and then, for no apparent reason, it starts to fail. The problem can be either software or component failures.

Such periods of normal operation, alternating with the inability to load the BIOS, are typical for three types of problems.

1. Presence of microcracks on the motherboard. Because of this, contact periodically disappears.
2. The electrolytic capacitors on the motherboard or power supply have dried out. This malfunction mainly applies to old system units that have been in use for a long time. Sometimes faulty capacitors can be identified by characteristic swelling of the housing.

Poor contact in the connected wires. As already mentioned - the presence of dust, oxidation of contacts, insufficient pressure. If the contactors have fixing screws, they must be tightened completely. The opposite situation also happens - clamping screws that are tightened too tightly lead to deformation of the connectors and poor contact in the connection.

The basic input/output system is the beginning of a computer's electronic life. In the event of a hardware or software malfunction of the BIOS microchip, successful startup of the computing device simply becomes impossible. Despite the extreme degree of reliability of the specified element of the computer system, software failures in the basic microsystem (due to many factors!) still occur. In most cases, the problem “BIOS does not start: what to do?” is resolved by simply replacing the CMOS battery, otherwise it is necessary to apply a comprehensive diagnostic plan, and only after identifying the cause of the problem, carry out a repair (correct!) algorithm of actions -. details in the article!

Not a short introduction: small BIOS and big consequences...

Indeed, everything depends on a small microcircuit, which contains a set of microprograms in its memory, and in totality is the basic microsystem of a computer! A very rare electronic ailment that occurs in our time is damage to the main BIOS record of the system (not to be confused with temporary data stored in CMOS memory!) - this is a “dead” motherboard. That is, the motherboard becomes completely useless, since it is deprived of a startup control element.

A partial malfunction of the microchip BIOS can be accompanied by an incredible variety of surprises, both hardware and software. In general, the beginning of all computing principles is a small microcircuit with a certain set of programs. The degree of efficiency of the computer you are using directly influences the overall service life of the computing device as a whole depends on how correctly you configure the BIOS. If for you, dear reader, everything written above has become news, then it makes sense to think: “Am I following the manufacturer’s critical instructions regarding operating rules?”

Why the BIOS suddenly stopped starting: a little about all the reasons

Let's move on to specifics, because the situation “does not start” can look different:

1. When you press the “on” button, nothing happens - a black screen and silence.
2. The computer turns on, the screen flickers with a black void (not active) - the noise of the fans is heard and the system speaker (BIOS speaker) beeps.
3. The computing device starts, some message is displayed on the screen - the buttons do not respond, except that... the restart works.
4. The system boots too quickly (and safely!), but you can’t get into the BIOS.

There is another interpretation of the problem voiced, when a novice user does not correctly understand what exactly is happening and at the same time wonders how to enter the BIOS in general? Let's start with the last one...

How to enter basic computer settings

Depending on the BIOS version(s), as well as the design features of the computer, access to basic settings may differ radically from the methods that are considered standard.

For example, in most PC modifications, entering the BIOS is done by pressing the “F2” or “Delete” function button. Moreover, the activation of one of these buttons is carried out immediately at the moment of starting the computer system at its initial stage. By the way, there is a special technique for calling the BIOS main menu - repeatedly pressing the corresponding button with an interval of two clicks per second.

There are other “tactile schemes” for entering the BIOS - some manufacturers equip the devices they produce with special mechanisms, push-button or lever type, when activated, the user enters the service menu of the base microsystem. However, there are also more exotic buttons - touch ones. However, the essence of the listed keys and service gadgets is the same - calling the BIOS Setup menu.

As for the “speed resistance” to entering the basic computer settings menu, there are several possible solutions:

• Enter the BIOS menu through Windows OS - use this link to read about how this is done.

• Try calling the BIOS using other service keys, for example, “F8”.

• Finally, you can get to the basic settings using the System Restore rescue disk or Windows distribution.

Black screen and silence: causes and solutions

This “electronic incident” has a rather long list of “causes and consequences”, however, it is possible to highlight the main symptoms of the malfunction, namely, to quickly identify the real culprit of the “silent triumph”.

• There is a 99.9% chance that the power supply has failed. Naturally, replacing the component with a known-good power supply unit will correct the situation in the direction of “Problem resolved!”

• The power button has failed - replace the switching element or check the wire for mechanical damage (obvious breakage, deformation of the wire, oxidation of contacts, etc.), of course, with its subsequent restoration (soldering, cleaning).

• Dust contamination of the inside of the computer case (especially important for portable computer equipment - a laptop) - it is necessary to clean all components of the motherboard, as well as the attached modules and wiring equipment, from dust. Do not forget to clean the protective mesh of the air intakes and other structural elements of the body.

The computer turns on, but the monitor screen is “full of dark secrets”

As a rule, problems with starting a computer system are always accompanied by a specific sound signal, the tone and sequence of which has its own decoding code.

To solve the problem described, you can also try changing the computer’s power supply, but more likely this “PC behavior” indicates that the BIOS has detected a faulty component in the system: one of the memory sticks (RAM) has failed, the hard drive has broken, or The processor temperature has reached a critical level. In the latter case, it is necessary to replace the thermal paste and check the cooling system cooler for serviceability.

Otherwise, user actions should be as follows:

• Disconnect all peripheral devices (printer, fax, webcam, external storage devices, etc.).

• Remove all RAM modules.

• Disconnect hard drives.

• Switch to a different graphics mode - change the video circuit from integrated to discrete, or switch to the built-in video chip if you used an external video card.

If an empty continent starts up, add one component at a time from the previously disabled components and carefully monitor the reaction of the microsystem as a whole. In any case, if the BIOS starts, it means you have already achieved a positive result!

By the way, do not forget that a black screen may be the result of a failed monitor. In laptops, the integrity of the connecting cable is often compromised, which is constantly subjected to dynamic load when opening/closing the display cover. In the latter case, it is better to contact a laptop repair service center. In both the first and second cases, to check the truth of the assumption, you can always try connecting an external monitor to the VGA connector.

In conclusion

Here, in brief, is the entire list of instructions for the problem “BIOS does not start: what to do.” We hope everything worked out for you and access to basic settings is restored. Of course, you should not lose sight of another not described way to resolve the problem - switch the CMOS jumper to the RESET position (then return the contact element to its original position).

And you know, this article has a big continuation, because the BIOS may not start due to swollen capacitors, as well as “dead” transistors... Don’t miss it!

BIOS is the most important component of a computer, the activity of which is aimed at setting up the operation of the equipment, checking its functionality, launching the operating system, and more. One of the most unpleasant situations that a user may encounter is when the BIOS refuses to start.
Let's imagine a situation: suppose you decide to reinstall Windows on your computer, but in order to run the installation program, you need to enter the BIOS. You have made more than one attempt to enter the BIOS, and all of them were unsuccessful.

Another situation: when the computer starts, the user first sees the BIOS interface, after which the computer proceeds to load the operating system. In some cases, the user may not see any image at all, that is, neither the BIOS window nor anything else.

Reason 1: Wrong key (combination)

First of all, you should question the correct hotkey you are using to enter the BIOS. Unfortunately, you can only find out which key in your case is by experience, that is, it was not possible to enter the BIOS using one button, next time you should try another.

The process of entering the BIOS is as follows: you reboot the computer or simply turn it on and at the very first stage of turning it on, you begin to repeatedly and quickly press the BIOS hotkey.

There are a huge number of options for entering the BIOS (this is especially true for laptops), but in most cases you will find one of the following keys: F1, F2 and Del. If not a single key helps you enter the BIOS, try Googling the model of your motherboard (for a desktop PC) or laptop model on the Internet to find out how to enter the BIOS for your device.

Reason 2: Non-working or unsupported keyboard

And although in rare cases the user has the opportunity to enter the BIOS without a keyboard, in 95% of cases it is impossible to do without it.

Needless to say, a computer keyboard must be in good working order? Be sure to test the keyboard's functionality by logging into Windows or connecting it to another computer.

If everything is fine with the keyboard, then perhaps the problem is that the keyboard is not supported by the BIOS. As a rule, a similar problem is observed among users of old computers (laptops), and if you use a wired or USB keyboard, then this may well be the case.

If you have a wireless keyboard, then we will need to use a wired one to eliminate the possibility of such a problem. Especially older BIOS versions may not support the USB keyboard interface, but to check this, you will either need to connect an old keyboard with a PS/2 connector or purchase a PS/2 adapter for a USB keyboard.

Reason 3: USB port not working

The port to which the keyboard is connected must be working. Try connecting the keyboard to a different port and try entering the BIOS again.

Reason 4: Conflicting devices

Try disconnecting everything you can from the computer: drives, hard drives or solid-state drives, all USB devices connected to the motherboard, PCI cards. If there is a built-in video card, then disable the discrete one, and then try to enter the BIOS again. If the attempt is successful, connect one device to the computer at a time to find out what is conflicting. Having identified a problematic device, it is precisely this device that you will need to deal with (it is better to take it to a service center for diagnostics).

Reason 5: Computer malfunction

If, when you turn on the computer, the BIOS starts making sounds, but does not want to start, you should listen to the signals and record them. Often the BIOS uses such signals to make it clear what went wrong. There are a lot of tables on the Internet that decipher sound signals for different BIOS versions, using which you can quickly understand the cause of the problem and begin to fix it.

Reason 6: Problematic BIOS settings

As a rule, a similar cause of the problem occurs when the user makes changes to the BIOS. In this case, you should try returning the BIOS to factory settings. As a rule, in most cases you will need to look under the system unit case, where on the motherboard you can find a special switch (CMOS jumper) that is set to position 1-2. To perform a reset, just move the switch to position 3-4 for 15-30 seconds, after which you can return it to its previous position.

Reason 7: Problems with the motherboard

The most unfortunate cause of this problem is that the motherboard is practically the entire computer. If you suspect a problem with its operation, you can carry out a short diagnostic procedure.

First of all, you will need to inspect the motherboard itself: is there any oxidation, are the capacitors swollen. Any external changes indicate its malfunction, which means that all this must be eliminated. If there is oxidation, it must be carefully erased with an eraser. If the capacitors are swollen, they should be soldered with new ones.

If visually everything is fine with the motherboard, you should try the following:

1. Disconnect your computer from the network, and also remove all unnecessary devices: mouse, speakers, keyboard, any additional devices and cables. As a result, only a network cable and a monitor need to be connected to the system unit.
2. Reset CMOS. To do this, you should remove the battery from the motherboard for a few seconds and then install it back.
3. Remove all cards from all motherboard slots, leaving only the processor and speaker connected.
4. Start the computer and pay attention to the sound: if there is any sound, this tells you that the motherboard is working. If not, then everything is much sadder - she does not respond.

If you have confirmed your guess that the problem is in the operation of the motherboard, you should try to take it to a service center - it is quite possible that a specialist will be able to restore its functionality.

These are the main reasons that affect the BIOS not starting. If you have comments on the article, leave them in the comments.

Updated: 02/26/2020 Published: March 13, 2018

Description

Every time you turn on the computer, the BIOS immediately opens (a blue window with settings). After exiting it, either the system starts or only the BIOS loads again.

Very often, this can happen with laptops from ASUS, MSI or Samsung.

Cause

Typically, the problem is caused by the BIOS not being able to find the device from which the operating system should boot. This may happen for the following reasons:

1. The settings of the basic input/output system have gone wrong;
2. There are no media to run the operating system or its malfunction;
3. BIOS software error;
4. Warning about computer malfunction - launching the menu indicates the presence of an incorrect setting, which can lead to failure of the PC itself. For example, incorrect bus frequency.

It is also possible that the BIOS start key (usually Del or F2) is simply stuck - because of this, the basic input/output system is constantly stuck.

Solution

Solutions are arranged in order of ease of diagnosis and likelihood of occurrence.

1. Enable Launch CSM (BIOS / UEFI mode)

In case of using systems that do not support UEFI (for example, Windows 7), it is necessary that the “Launch CSM” option is enabled (this option is responsible for compatibility with older operating systems). If it is disabled, first find the “Secure Boot” option - disable it and restart the computer. Then we activate Launch CSM. Afterwards you can try restarting the computer.

We check if there is a Boot Device Control section and the ability to choose between such parameters as: UEFI and Legacy, UEFI Only, Legacy Only. For older versions of the system, you should choose Legacy and UEFI Only or Legacy Only. For new systems you need to try different options.

Some BIOS/UEFI versions have an option to select the type of operating system - there may be Windows 8 (7) and Other OS options. For systems that do not support UEFI, select the last option.

2. Checking the disk drive

We check the functionality of the disk on which the operating system (or bootloader) is installed. To do this you can:

a) See if the BIOS disk is visible in the partition Main.

b) Disconnect the disk from the computer and insert it into another, checking that it is detected and data can be read from it.

12. Setting date and time

We go into the BIOS and check that the date and time are correct. If they are incorrect, then set the correct values. Apply the settings and exit the BIOS.

If the date and time are lost when the computer is turned off, the motherboard battery must be replaced.

13. Disabling fast boot

Disabling fast boot in the BIOS may also help. To do this, find the option Fast Boot and move it to position Disabled. The option itself can be found in one of the sections:

• Advanced - OS Configuration
• BIOS Features

* please note that the “Quick Boot” option, similar in name, has a different purpose and does not affect our settings in any way, so there is no need to touch this option.

14. Bootloader recovery

Due to system boot problems, the computer will constantly launch the BIOS. The operating system may not start due to problems with the bootloader.

To solve the problem, run . Then run 2 commands on the command line:

bootrec.exe /fixmbr

bootrec.exe /fixboot

We check the system startup. If this does not happen, run the commands:

bootrec.exe /scanos

bootrec.exe /rebuildbcd

* using these commands we will scan the disk for operating systems and write the found systems into the boot.

We check the system startup again.

15. System Restore

The problem can be resolved by using a checkpoint recovery tool. Let's start again restoring the system from the Windows installation disc. After we do system rollback.

We try to select a point at the moment when the system started normally.

16. Update BIOS

To update the BIOS, download the latest version from the motherboard developer's website. Instructions are attached to the downloaded archive - we carefully study it and carry out step-by-step actions.

If the latest version of the BIOS is already installed on the computer, then install it again (reflash the BIOS).