Can anyone clarify exactly what information is wiped when this is done and what needs to be done after the CMOS is cleared? All forum topics Previous Topic Next Topic. Replies 5. All BIOS changes are cleared and reset to factory defaults. The best advice is "if it ain't broke don't fix it" Welcome to DCF.
Thanks again. Ratz 3 Argentum. Thanks Ratz, I have already done that. Post Reply. Top Contributor. Dell Support Resources. Latest Solutions. Can't find what you're looking for? You can post your question in our community. Eventually, these batteries do die and it's better to replace it on your own terms than have to deal with it later, when you are in the middle of an important project.
Most desktop motherboards will have a jumper like this but most laptops and tablets will not. Make sure your computer is unplugged and then open it up. Move the little plastic jumper from the 2 pins it's on over to the other pins in a 3-pin setup where the center pin is shared or remove the jumper entirely if this is a 2-pin setup. Any confusion here can be cleared up by checking the CMOS clearing steps outlined in your computer or motherboard manual. Turn the computer back on and make sure that the BIOS settings have reset, or the system password is now cleared — if that's why you were clearing CMOS.
If everything is good, turn off your computer, return the jumper to its original position, and then turn the computer back on.
If you don't do this, CMOS will clear on every restart of your computer! Actively scan device characteristics for identification. Use precise geolocation data. Select personalised content. Create a personalised content profile. Measure ad performance.
Select basic ads. Create a personalised ads profile. Select personalised ads. Apply market research to generate audience insights. Measure content performance. Develop and improve products. List of Partners vendors. Tim Fisher. VP and General Manager, Lifewire. Tim Fisher has more than 30 years' of professional technology experience. For instance a 5 beep code sound would indicate an issue with the CPU etc. This is the chip where the BIOS settings are installed.
This is most non-invasive and the easiest method to try out before going into the more technical methods listed below. Your computer needs to be restarted for this. Find the specific key you need to press to access the BIOS on your computer. Some popular ones are F2 and F As the computer restarts, repeatedly press on the specific key you identified before you see the first logo. You will have a short window of time to do this. If your specific issues resolve after this, then no go any further.
So if you have made any changes to your hardware, this is where they get stored. Sometimes CMOS settings can also get corrupted and that may warrant a reset. One popular method is to disconnect the CMOS battery from the motherboard.
The CMOS battery enables the motherboard to keep the settings such as the time, date and your user defined BIOS settings intact even when the computer turns off.
You will need to know this when putting the battery back. Try to open it using a precision screwdriver without applying a lot of force. As you push on the latch, you may see the battery lift up. Carefully reconnect the battery. You will hear the latch make a clicking sound once it is in place. A warning will be presented to you that the time is not set.
There are many issues that indicate that the CMOS battery is low. For instance, if your PC turns off without any notice or without any obvious underlying issues with the rest of your hardware, then replacing the CMOS battery could help.
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