Often overlooked but highly essential to your personal computer system is something called your CMOS battery. CMOS is actually a chip which is built into your computer’s motherboard; it retains your system data and its settings. It is stored here so that the data is maintained and not erased, corrupted or accidentally edited. CMO List This chip does not need your computer power supply as it has a battery built into it. This battery generally has a life span of up to ten years. As you can imagine when this battery begins to run low on its power, it can cause instability and even more.
CMOS Battery Failure Symptoms
* Incorrect time and date on your computer. This is one of the earliest warnings and a way to know that it is time to replace the battery.
* Computer will not boot up.
* You may start getting errors during boot up from the motherboard BIOS that state: “CMOS Checksum Error’, ‘CMOS settings wrong’, ‘CMOS battery error’ and or ‘CMOS read error’.
* Blank screens during boot up; or unexpectedly during normal use.
* Saving files or programs does not seem to take. If you install a program one day, and then the next time you turn on your computer it is not there and you have to reinstall it.
* Computer shuts off without notice.
* Drivers no longer installed, or have become corrupt.
* You may run into other strange software and device issues such as your computer no longer being able to locate your printer or mouse; programs will not open on the first few tries, etc.
These are the most common CMOS battery failure symptoms and errors; however, your computer could throw off other signals that are not listed. If your computer is more than a few years old, it could be a wise decision to have the battery tested at first onset of any of these symptoms.
Most computer retailers now have technicians on-site that can test the battery to see if indeed it is running down, most of the times the test will be free. In the event that this was the issue, you will be able to have the technician replace it for you at that time. Unless you have extensive experience working with the internal parts of a computer, it is a good decision to have a professional do the actual CMOS battery replacement.