What Does the BIOS Actually Do?


The BIOS (Basic Input Output System) is the primary software program that each laptop has. Among different issues, it’s used to establish and handle all laptop parts. It is an integral a part of a pc and is present in a separate chip on the mainboard.

It is the first software program to be loaded when the laptop is switched on and checks, amongst different issues, the built-in laborious disks and DVD drives required to begin the working system, for his or her bootability.

When the parts are working correctly, the BIOS prompts the acceptable drives to permit a pc’s precise working system besides.

Important features and properties

In addition to shortly checking the drives, the BIOS can also be used to manage and alter particular person PC parts equivalent to the CPU. For instance, in the BIOS settings of newer processors, you’ll be able to alter whether or not so-called overclocking, i.e. overclocking the CPU to optimize system efficiency, ought to be switched on.

Another essential space is the boot sector. In this, customers can manually specify which lively parts – i.e. laborious disks and drives – ought to be began by which order when the PC boots up. Normally, the particular person drives and laborious disks are switched in such a manner that the laborious disk on which the working system is positioned begins first and different parts equivalent to a DVD drive are managed second.

However, there are conditions when it’s crucial to vary the boot order. For instance, if a brand new working system is to be loaded onto a pc from a DVD, the boot order have to be modified in order that the DVD drive is loaded first at startup and never the boot laborious disk.

Changing the boot order will also be helpful if a tough disk can’t be began or you’ve got two totally different working methods on two laborious disks. In addition, a BIOS chip is a management instrument that retains monitor of how excessive the CPU’s temperature is, how a lot energy is being consumed and the like.

Experienced customers can use this data to vary the settings of their {hardware} parts, which may enhance efficiency or scale back the energy consumption of the PC.computer BIOS

The capability to replace the BIOS

The BIOS on a mainboard is usually outdated in some unspecified time in the future and you could find a more moderen model from the producer of the mainboard. The solely query is whether or not an replace, also called ” flashing the BIOS “, is critical in any respect. Because so long as every thing works with out issues and all {hardware} parts are acknowledged, an replace is definitely superfluous.

It would solely actually matter if, when assembling a PC, there have been difficulties in agreeing on the drives or the mainboard and the graphics card, for instance. And even then, an replace ought to be seen somewhat critically.

Because if an error happens throughout the replace, which may occur as a result of an influence failure or an incorrect obtain of the software program, issues shortly get actually unhealthy. As a consumer, you might be then confronted with the downside: the BIOS doesn’t begin. In the worst case, the PC can now not be began in any respect and have to be repaired by a specialist.

Therefore, so long as every thing works accurately, you don’t have to hold out an replace. Should an error happen throughout the replace, there are numerous suppliers the place you should purchase new BIOS chips for mainboards and notebooks for little cash. Usually, the newest BIOS model is already put in there.

BIOS beeps and what they imply

This typically occurs when the laptop now not begins and beeps might be heard. With these beeps, the laptop tries to inform us what’s incorrect. So it will be helpful to know what the most typical beeps imply.

This scenario can happen specifically when a brand new laptop is assembled. It’s useful if roughly the place to look.

The most essential beeps:


  • 1x: RAM faulty or not correctly plugged in
  • 6x: Keyboard faulty or lacking
  • 8x: Graphics card faulty or not put in accurately
  • 11x: Checksum error, the mainboard battery could also be empty


  • 1x lengthy: RAM faulty or not correctly plugged in
  • 1x lengthy 2x quick: Graphics card faulty or not put in accurately
  • Continuous tone: Graphics card or keyboard is lacking
  • 1x lengthy 3x quick: keyboard faulty or lacking, with newer variations it will also be a faulty graphics card

Phoenix BIOS:

  • 1x-1x-4x: BIOS defective
  • 1x-2x-1x: Mainboard faulty
  • 3x-1x-1x: Mainboard faulty
  • 1x-3x-1x: reminiscence downside
  • 3x-3x-4x: Graphics card faulty or not put in accurately

If the downside can’t be clearly recognized from the beeps, you may also search the assist of different customers in a pc discussion board or one other neighborhood.

In this manner, you’ll be able to clear up many issues your self with out utilizing a paid restore service.the BIOS functions

Forgot BIOS password

The following downside typically comes up. You need to change a setting in the bios, however you’ve got forgotten the password or you’ve got dusted off an inexpensive PC from Ebay and Co. and can’t get into the bios.

But there’s a manner. The methodology described under can even reset all settings to the default values. That’s nothing unhealthy, however the settings ought to undoubtedly be checked and corrected if crucial.

Start the laptop with a DOS start-up disk and enter the debug.exe command in MS-DOS. Now sort in the following instructions:

-o 70 2e
71ff -q

After restarting the laptop, a CMOS error message will seem. The good factor is you could now enter the BIOS with none issues. But as I stated, all settings are set to the default values. Check and proper if crucial!

However, these days one has to ask: Whose laptop nonetheless has a floppy disk drive?

Since this methodology includes some dangers, you must maybe attempt two different choices beforehand.

Delete BIOS password – This at all times works

Do you need to delete the BIOS password? Then you’ll be able to attempt the following: Check the handbook for the mainboard or straight on the mainboard to see if there’s a jumper labelled CLEAR CMOS or one thing related. If such a jumper is current, you’ll be able to restore the default values ​​( BIOS reset ) by altering the place and thus additionally delete the password. But the similar applies right here: After the restart, verify the BIOS settings and proper them if crucial.

If this jumper is just not accessible, you may also attempt the following. The laptop is switched off, similar to earlier than altering the jumper. To be on the protected aspect, disconnect the laptop from the socket and take away the small, spherical battery on the mainboard. Incidentally, that is additionally the way you proceed if you wish to change the BIOS battery, as a result of the date and time could hold altering.

After about 10 minutes the BIOS ought to be reset…