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One beep from your computer at startup can cause your whole day. Just ask anyone that has turned on the PC and suffered the agony of some beeps and therefore nobody.

When you obtain a computer, it will make your mark and the BIOS (Basic Input/Output System), pre-installed on an EPROM (Erasable Programmable read Only Memory), chip on the main/motherboard. When you initiate your computer the CPU (Central Processing Unit), sends inspection of the PC to the EPROM BIOS. The BIOS is role of the POST (Power-On Self Test) of the computer. Once the BIOS receive the go ahead since the processor it starts its magical journey complete all the components and peripheral procedure attached to the computer.

CMOS (complementary metal-oxide semiconductor), attach the data that is accessed by the BIOS arrangement. Basically, the CMOS is the explanation that you know how to unplug your computer and keep hold of the startup and BIOS information. CMOS is maintained on the motherboard in an always-on state supported by a battery installed on the highest board.

How the BIOS work?

Each computer comes pre-loaded with the BIOS on the motherboard. Motherboard manufacturers work long hours with BIOS manufacturers to make sure the information in the BIOS is certain to the desires and components of the motherboard. Although there are a number of BIOS manufacturers, the two most popular are AMI (American Megatrends Incorp.) and VIA. BIOS simply put, is a program and not a concrete device. It is the software that informs the computer at startup of all the devices (input and output) attached to the PC.

The BIOS also lets you appreciate when there is a dilemma. It accomplishes this by checking for known devices and makes sure they are still attached. When the BIOS identify a problem it sends a series of beeps to the motherboard speaker. This series informs the user of what the problem is, at least as well as the BIOS can decide. The BIOS sends a series of beeps to the onboard PC speaker to report to you of the problem. Pretty clean. The problem is that no manufacturer of BIOS uses the identical beep series. This is why it is important for you to live through the BIOS software manufacturer for your given PC. We will vindicate how to find this out soon.

How do I recognize if the BIOS are working?

That is simple, if your computer starts and you get a single short beep, the BIOS is working and has found and relayed the information roughly the input/output devices to the CPU. If you turn on your computer and nothing happens at all, the riddle is probably in your power supply (this assumes that you have it plugged in properly). The BIOS is almost certainly still working but the computer can't start because of a power problem. If all is well, the BIOS will find all the attached input/output devices, fire a single short beep to the interior speaker and the computer will set off the boot progression.

There are three ways to change and/or bring up to date the BIOS. Unlike ROM (read-only memory) the EPROM BIOS can be changed or updated. The idiom for altering the EPROM software is referred to as flashing. You may possibly have over heard someone say with the aim of they need to flash the BIOS with a new update. Don't worry if you have not at all heard this, well, maybe you should fret a little. Computer components transform on an every day basis and the BIOS needs to be flexible enough to be able to change with them. All computers let the user to change the BIOS software and how the computer reacts to input/output devices. The standard is to offer the user a way in to the software using a hotkey at startup. More often than not this hotkey is the F2 key, the Del (Delete) key and in some cases the F1 key or a mixture of keys. Launch your computer and observe the bottom left corner on the screen. This should consent to you know which key to press to enter the BIOS setup. The BIOS setup, sometimes called the CMOS setup, allows the user to formulate changes on the fly and save them.

Let's say you added an external modem to your PC on Communication serial port number 1(Comm1), and no matter how many times you install the drivers, you cannot get the PC or Windows to attach importance to it. Probability is that the BIOS do not know that the modem exists. Entering the BIOS setup and changing it to let the use of Comm1 will tight spot the problem and consent to the PC know that a device exists on that port. This is the most customary use of the BIOS setup and also the easiest to prepare.

Changing the incorrect settings can render your computer useless. There, we warned you twice, that is because we want you to ponder twice before you change the BIOS. Second is the Flash BIOS update from the manufacturer of the BIOS. This is a software program that the manufacturer of the BIOS sends out periodically to indemnify the BIOS conform to new equipment and standards. You can normally find this software upgrade from the manufacturer and sometimes from the motherboard manufacturer. Be careful, be very careful installing the software and be confident that it is for your limited BIOS. Always see the manufacturer's directives exactly. The third way is replacing the BIOS chip. Replacing the chip possibly will be your only recourse and should be left to licensed computer repairmen.

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