A computer needs a certain amount of information to operate; for example, the date and time, the amount of memory installed, the number of drives and their configuration, and so on. In the early days of computers, either the user typed in this information each time the computer started, or it was set using DIP switches and jumpers. Today, computers store this information in a CMOS chip that uses a small battery to retain the information when the computer is shut off.
CMOS (complementary metal oxide semiconductor) is type of chip that consumes very little power; therefore, while the computer is turned off, the battery discharges very slowly. But the battery will totally discharge if you leave your computer turned off for a year or so. Even if you turn your computer on every day, the battery is designed to last only a couple of years. Occasionally a battery will fail prematurely.
Today's plug-and-play computers can detect most of the necessary settings, but if your CMOS battery is dead, your computer will not be able to retain the date and time. The computer will also lose any custom settings, for example, the boot sequence. If you set a password in CMOS, you may be locked out of the computer. If the CMOS battery does fail, you might receive the message "System Configuration Lost" when you start the computer. It would be wise to record all the CMOS settings as a precaution.
To record the CMOS settings, watch for an on-screen prompt when you first start your computer. The prompt tells you to press a key, usually the Del or F2, to enter CMOS. To enter the CMOS configuration utility, you have to press the indicated key while the message is on the screen. After the CMOS configuration screen appears, follow the instructions provided to page through all the screens and record all the settings.
If your computer loses its time setting overnight, the CMOS battery may not be holding a charge. The CMOS battery is located inside the case on the motherboard. Changing the battery is usually a job for a computer technician. In fact, a layman might not even be able to find the battery.
If you want to locate the CMOS battery in your computer, be aware that a static discharge from your hands can damage components inside the case. After taking proper precautions, open the case and look on the motherboard for a battery. If you have a diagram of your motherboard, locate the battery on the diagram first.
Different motherboards use different types of batteries. The battery may be shaped like a barrel or a coin. Some motherboards use a component that resembles a chip which contains the CMOS and the battery (made by DALLAS or Benchmarq). Batteries come in different voltages, so make sure you get an exact replacement.
Sometimes the battery is mounted in a holder. Sometimes it is soldered to the motherboard. De-soldering and re-soldering a battery is usually a job for a computer technician. An inexperienced solderer can cause a lot of damage. If you want to try to do it yourself, first practice on an obsolete circuit board. You may change your mind.
If the CMOS battery has failed because it's too old, this might be an opportunity to upgrade your motherboard. When upgrading a motherboard, the most important considerations are to make sure the new motherboard is the correct form factor for your case, and that the new motherboard has the correct bus connector slots for your expansion boards.
Copyright(C) Bucaro TecHelp
Permission is granted for the below article to forward, reprint, distribute, use for ezine, newsletter, website, offer as free bonus or part of a product for sale as long as no changes are made and the byline, copyright, and the resource box below is included.
About The Author
Stephen Bucaro
To learn how to maintain your computer and use it more effectively to design a Web site and make money on the Web visit bucarotechelp.com To subscribe to Bucaro TecHelp Newsletter visit bucarotechelp.com
post construction cleaning Deerfield ..Step 1:Open WinRAR and browse to the folder with your... Read More
Get started creating web pages using text files and HTML... Read More
Cameras: still known for taking pictures but assumed as digital... Read More
In the first part of this home lab tutorial, CCNA... Read More
The DNS (Domain Name System) servers are what your computer... Read More
Microsoft Business Solutions is on the way to popularize it's... Read More
Flow Text Around a GraphicQuestion: I have inserted a photo... Read More
If you're like me, you occasionally find the ubiquitous mouse... Read More
In this era of Internet, most people are frequent users... Read More
JVC developed and used a high-performance reflective film to produce... Read More
With a little tweaking and with proper tools, you can... Read More
Wouldn't you be shocked to find that your personal sensitive... Read More
iPod users start to get the picture and it's turning... Read More
For those seeking to buy their first flat panel TV... Read More
System File Checker is a great utility that is typically... Read More
Since the DOS days, batch files have been one of... Read More
Feeling overwhelmed in selecting a new TV? With all the... Read More
I met an entrepreneur who hole heartedly disagree with an... Read More
As the Web grows more crowded and just plain "noisy"... Read More
If you don't have an mp3 player, and even if... Read More
After reading this good article you will know some important... Read More
The Internet is an awesome tool, but be careful and... Read More
The registry is where the computer stores information about the... Read More
Most people think that all you have to do to... Read More
Lost & Found for the 21st CenturyIn today's hectic world... Read More
Airbnb cleaning service Bannockburn ..Feeling overwhelmed in selecting a new TV? With all the... Read More
Your Bible At Your FingertipsIt is fairly easy to find... Read More
Most of the web applications have a lot of images... Read More
Computers are everywhere, and vary in specification, brands, sizes, shaped,... Read More
Maybe you always wanted a feature that hasn't been available... Read More
As the web has evolved, so have the methods of... Read More
Not so many years ago, homes across the country watched... Read More
You probably heard of the new Firefox browser version 1.0... Read More
OK, so you caught a computer virus and your system... Read More
Are you thinking of buying an Apple iPod? Or have... Read More
I recently got an e-mail asking about virtual memory. The... Read More
IntroductionMac OS X is the most technologically advanced operating system... Read More
The Cisco Certified Network Associate (CCNA) Certification is meant for... Read More
Passwords have a strange dual nature. The stronger and safer... Read More
Most people think that all you have to do to... Read More
Nothing is worse than having to negotiate all kinds of... Read More
Apache, MysQL and PHP for Windows could be a nice... Read More
Enhanced Definition Television ? also known as EDTV ? is... Read More
Occupational Therapy Made EasierMedical downloads for the pda have improved... Read More
The best way to get the gaming computer that you... Read More
With a little tweaking and with proper tools, you can... Read More
Flash mp3 players come with an exciting array of features,... Read More
Save money. Save 10-15% on utility bills per month. Work... Read More
So you've got some spyware, ad-ware, or viruses on your... Read More
A computer needs a certain amount of information to operate;... Read More
Personal Technology |