Additionally, the hardware configuration and system settings need to be accessed as soon as the computer boots. Most CMOS batteries last for about years. That is a wide range because there are some factors that influence this. The CMOS battery is never used whenever your computer is plugged in. In laptops, the CMOS battery may also charge itself whenever it is plugged in. This doesn't mean that your CMOS battery will discharge in a few weeks if you don't plug in your computer.
Most CMOS batteries will have a shelf life of at least a couple of years, even if you don't plug in your computer at all. Your computer will start acting abnormally when the CMOS battery is discharged. Here are a few of the tell-tale signs:. Removing the CMOS battery is a relatively simple process, even if you haven't handled computer components before. Use a 3d-party backup program. Posted 21 February - AM.
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I put the battery in this orientation, and the system booted up fine and is working great. After purchasing a new battery, remove the old battery and replace it with the new battery. Some computers may not have a removable battery, for these computers insert the new battery into the secondary battery socket on the motherboard. Once the battery has been replaced, turn on the computer and reset the CMOS values to the defaults.
After the values have all been entered, make sure to save the settings before exiting. If you continue to receive the error after following all the steps above, this is a sign of a more serious issue.
The most likely causes are a bad power supply or bad motherboard. You may need to look into replacing the power supply or the motherboard to resolve the issue. At this point, we would recommend taking your computer to a computer repair shop to have them diagnose the issue. Caution When inside your computer, make sure you are aware of ESD and its dangers.
Note With some computers, you may need to disconnect cables, remove drives, or remove other parts of the computer to get full access to the CMOS battery. Tip For most computers, the model of the battery is CR Caution When inside your computer, make sure you are aware of ESD and all its potential dangers.
CMOS help and support.
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