If on your computer reset time and date. If dumped BIOS settings . If violated Windows boot(for example, Windows boots from the second time). That came time to change CMOS battery on motherboard in your system! Here is the answer to the question: “Why does time get lost on the computer?”!
After the battery is replaced, the first time the computer is turned on, the factory settings stored in the BIOS will be "reset" to the CMOS memory. This, by the way, is one of the ways to troubleshoot if you are "too smart" with the BIOS settings. To do this, turn off the computer, remove the battery from the motherboard for 30 seconds, install it back, and the factory BIOS settings will be restored, and the computer will work again.
CMOS battery life
Battery life is 3-5 years. However, there are exceptions - some batteries last longer (high-quality) or less (due to marriage). If the battery is the cause, then most likely other user settings will go astray along with the clock.
What is BIOS and CMOS
For those who first encountered the word BIOS, I will explain. BIOS(English basic input / output system - “basic input-output system”), also BSVV, is a part of the system implemented in the form of firmware software, which is intended to provide the operating system with API access to the computer hardware and devices connected to it.
CMOS(the name of the technology by which the microcircuit is produced: Complementary Metal-Oxide-Semiconductor - complementary metal oxide semiconductor or CMOS). In addition to BIOS settings, CMOS stores computer configuration settings.
Another reason to reset the date and time
Second the reason that the time on the computer goes astray may be the wrong choice of time zone your region. It is important that the time you set matches your time zone. If the time zone is set correctly, the battery is good, and the time on your computer still gets lost, then we can assume that your system does not have latest updates and there are disagreements with the Internet time server. To prevent the time on the computer from going astray, you need to do the following.
On the clock in the tray, right-click, after which it will open context menu. Then select Set date and time.
On the Date and Time tab, select Change Time Zone.
Uncheck the Automatic Daylight Saving Time check box and click OK.
Next, go to the Internet time tab and click - Change settings.
If your BIOS settings crash after every reboot of your computer or laptop, then this situation can sometimes cause you great inconvenience. For example, in this case, you will not be able to use a password to enter the system or the BIOS setup program, as well as use your own processor frequency and voltage settings necessary to overclock your computer. However, practice shows that, as a rule, you can fix the situation when the BIOS does not save the settings on your own, without resorting to the help of computer specialists.
Suppose you made some changes to the BIOS and saved them, then rebooted and found that the changes you entered were not saved, that is, they did not take effect, and the system uses the factory default BIOS settings instead. Or, when booting up, the computer reports that the BIOS contains incorrect data and prompts you to go into the BIOS setup program to make changes to it. Of course, if this situation is repeated constantly and your settings are constantly lost and not saved, then this creates significant problems in using the computer for its intended purpose.
This problem can have several different causes and the choice of method for solving the problem depends on what kind of reason is behind the phenomenon. First of all, if you find such symptoms, you should check. This battery powers the CMOS memory, which stores all the data entered by the user in the BIOS. Therefore, when full charge batteries, the contents of the CMOS memory cannot be stored for a long time.
It also happens that the BIOS settings are not saved in case of errors in the BIOS itself, poor contact of the BIOS chip with motherboard, a poorly seated BIOS battery, CMOS memory failure, and, less commonly, a malfunction of the power supply or power button.
Problem Solving Methods
In most cases, resetting the CMOS memory or replacing the battery that powers this memory with a new one will solve the problem. We wrote about how to reset the CMOS memory and how to change the battery in the relevant articles.
If you reset the CMOS memory and replaced the battery with a new one, but, nevertheless, the BIOS settings still fail, then you can try to check the power supply, the power button, and the contacts of the BIOS chip. It also makes sense to check if the battery is sitting securely in its socket. If you made sure that these factors are not the source of the problem, then most likely the problem is a malfunction of the CMOS memory, BIOS chip, or the motherboard itself. In this case, you will need to replace the faulty chip or replace the entire motherboard.
Conclusion
The ability to make changes to the BIOS settings is an important tool that allows the user to optimize the performance of the computer and bring it in line with their requirements. Therefore, the inability to save settings in the BIOS of a personal computer or laptop is a great inconvenience for the user. This situation can have various reasons, but in most cases it is the result of poor contact between the battery that supplies the non-volatile BIOS memory and the socket or its discharge. Therefore, replacing the BIOS battery is usually able to resolve the problem described.
Greetings!
BOIS stores information and manages the underlying hardware that is installed on your computer. The BIOS is also responsible for the correctness of the time displayed in the operating system.
Why reset BIOS settings
You may need to reset the BIOS settings to default in the following situations:
1) You have installed any additional hardware on your PC, but it refuses to be detected by the operating system, or there are problems with its operation: the hardware disappears from the system from time to time, the system freezes, etc.
2) In an attempt to "overclock" your computer, you have set options in the BIOS that are not actually supported by the hardware installed in your PC. As a result, the computer did not turn on at all.
3) You have updated the BIOS, and in this situation it is recommended to perform a factory reset.
4) There was a need to reset the password that is requested when the computer is turned on (before the actual boot of the installed operating system).
This material will describe in detail and demonstrate with specific examples how to reset BIOS settings to default (default) on a personal computer and laptop. We will consider resetting the settings both from the BIOS itself, and by directly switching the contact / battery on the computer motherboard that powers BIOS chip and does not allow you to "forget" the saved settings.
Reset BIOS through the corresponding menu item
The easiest and most logical way to reset BIOS settings is to use the menu item that is available in the BIOS settings itself.
It should be noted that this item is available in almost all versions and variants of BIOSes, however, its name and location may vary.
In order to orient you, I will show the location of this item in a typical BOIS using a specific example.
To enter the BIOS settings, you must straightaway after turning on (even before the operating system itself boots), press the key several times Del on the keyboard of a personal (stationary) computer, or another key if it is a laptop. The most commonly used key to enter the BIOS on laptops is F2.
In the once popular and ubiquitous BIOS versions This item was located in the main menu:
Load Fail-Safe Defaults- Reset BIOS options and settings to default. In this mode, all computer components will undergo a complete test. It is recommended to resort to it before installing the operating system and if you suspect that some component is intermittent, for example, a RAM chip.
Load Optimized Defaults- if you select this item, then the BIOS settings and parameters will also be reset, but with an emphasis on optimization. IN this mode some components will pass a “stripped down” test, which will make the computer boot up faster.
If we talk about laptops, then everything is somewhat more complicated. In them, the BIOS menu interface can be heavily redesigned and stylized under the company's brand.
For example, in an HP laptop, the BIOS looks like this. Here, the settings are reset by selecting the item Restore Defaults.
The name of the item that resets the BIOS settings may be different, namely: Load Setup Defaults, Load Optimized Defaults, Reset to default, factory default, Setup Defaults and consonant. The location may also differ, most often this item is in the tab exit.
Based on the foregoing, you will need to find this item in your BIOS version (including UEFI) and click on it. Navigation in the BIOS is carried out with the keys arrows, and key selection Enter.
After resetting the settings, the computer will either restart or you will need to exit the BIOS with the settings that were reset to the default.
If you do not have access to the BIOS due to set password, or the computer refuses to turn on at all after "experimenting" with the BIOS settings (as an option, in an attempt to overclock the computer), then the following reset method will suit you.
Reset BIOS via jumper on motherboard
Most computer motherboards have jumpers that physically consist of pins and, if necessary, are shorted using nozzles (jumpers). Closing/opening certain jumpers configures certain PC parameters.
By closing the jumper, which refers to the BIOS, the settings will be reset to the default option.
To reset the BIOS using a jumper, do the following:
Unplug your computer from the electrical outlet by unplugging the cord from the outlet. After that, you need to arm yourself with a screwdriver and unscrew the screws that hold the side cover of the computer.
Having gained access inside, you will need to find a jumper on the motherboard located there, which is responsible for resetting BIOS settings and parameters. This jumper in most cases is located near the battery, which powers the BIOS and prevents the settings from being forgotten.
As a guide, the jumper is often signed accordingly: BIOS RESET, CMOS RESET, CLEAR CMOS, and the text can be abbreviated, for example, CLR_CMOS.
The jumper itself can consist of two or three pins. If there are three pins, then move the jumper to the next pair of pins, and if there are two, then you should borrow the jumper from another place on the motherboard. Just before borrowing a jumpik, remember, or better yet, take a picture of its original position.
After that, you need to hold the power button for about 10 seconds. The computer, of course, will not turn on. completely de-energized, just this procedure required to reset BIOS settings.
Having done this, return the jumpik to its original position, and then put and screw the computer cover back on, connect the power.
Done, the BIOS has been reset. Now you can reconfigure the BIOS settings, or use the ones that were set by default.
BIOS reset method with battery removal
The BIOS reset jumper is located next to the battery in most cases. This is due to the fact that the chip that stores the BIOS settings is not non-volatile. This battery just feeds the BIOS, allowing you to save the settings specified by the user, as well as maintain the built-in clock during the period when the computer is turned off.
After pulling the latch, carefully remove the battery for a few minutes, and then return it to its place - the BIOS settings and parameters will be reset.
It should be noted that in rare cases the battery is non-removable. Take this fact into account if you see that the battery is very firmly planted in the slot.
Summary
Now you know when to use BIOS reset and how it can be done. The first method is universal, while the second and third are more suitable for stationary personal computers. Laptops also have a battery that powers the BIOS, but getting to it is often much more difficult.
If after reading the material you still have questions, then do not hesitate to state them in the comments.
