Windows 10: replace cmos

After the battery is replaced, how do I know what settings should be in the BIOS?
Should I disable the flash in my camera and take pics of the BIOS? There are a lot of sub menus.
What is important to remember?
If I click default that would return it to factory so that is not what, I want I assume.
Thank you

:)

 

PC shows the Shutdown time/date

Replacing the battery of your motherboard (CMOS battery)

Replacing the Battery of Your Motherboard (CMOS Battery)



An inexpensive purchase:

Battery CMOS CR2032 Coin-Cell:Amazon.co.uk:Computers & Accessories

 

Clock not working properly

You might have to replace the RTC cell in Laptop.

https://www.techwalla.com/articles/replacing-cm...

CMOS battery also know as RTC battery | Laptop Parts 101

 

Are you getting messages that the battery needs replacing? How comfortable are you working with electronics, around things that can shock you? The quarter-size battery, usually a CR-2032, is relatively easy to remove, helps to have a pencil-style magnet to lift it out of the socket. I usually leave computer off but still plugged in to make the change and settings don't get lost but then I've built and repaired computers. As for the BIOS which is stored on the CMOS, if you didn't make any changes during install of Windows there should be no problems after the change but you may have to enter the Setup to re-detect the drives.
BIOS = Basic Input Output system
CMOS = Complementary Metal Oxide Semiconductor

 

If your system is currently working then you should keep track of all the settings you currently have (either remember them or take photos) and just restore those after changing the battery.

Yes, there are a lot of sub-menus. But unless you know exactly which ones you changed then there isn't another way to back them up.

If you don't want to do that then just load the defaults and only change settings if you absolutely need to. Assuming that this is the Dell XPS in your profile, the PC shipped with the factory defaults. If anything changed it would have been from you (or the person who originally set up the system).

 

My machine is about 5 1/2 years old. I will wait to see if the clock fails.There are no symptoms but I wanted to ask in case.

I guess taking pics wont hurt but I think you said if I hit default which I see under F2 I would only have to change settings that ask to be changed, or are necessary. I have not made any change that i know of except maybe boot order.
I don't know whether to unplug it or not though.

 

You don't have to unplug it as long as you're careful not to drop the battery onto the motherboard. If you don't unplug it then you won't lose your settings. As Berton said, a magnet would help prevent any accidents.

 

Hi,
There shouldn't be any issues using default bios settings
Boot order is pretty easy to alter.

 

I have my info thanks to you all.
At my level I will unplug and have already taken pictures of the BOIS and sub menus.

 

Your BIOS probably have settings for Factory defaults and/or enhanced. Look in your MB's manual, it's usually F5.

 

Yes F9 restores all to factory settings within the BIOS

 

Hi,
The only item besides possibly boot menu options that might cause or one might have issues with is fast start.
But if one knew there was an issue they'd probably also disable fast start in the 10 os too for good measure seeing a lot of older hardware is not comp[atible with 10's new features.
In which hibernation would be disabled in win-10 with command prompt as administrator and
Code: powercfg -h off[/quote]

 

I use sleep, shutdown via power and restart. I went to the fast start area and saw hibernate was not enabled at startup.

 

Hi,
Having hibernation off does not effect sleep it just won't hibernate or hybrid sleep which you may already know if it was already off *Smile

 

I always unplug the PC when maintaining the inside of the PC. Otherwise there is still a +5V standby supply to the motherboard and you risk shorting something if you drop the battery or a screwdriver onto the motherboard.

You need to record the BIOS settings you are using, particularly for settings like secure boot. I store these settings in a file and keep a printed copy with my motherboard user guide. Some people take screen photos but this is somewhat laborious. Check to see if your BIOS can save BIOS settings and save them if possible.

When removing the CMOS battery, check the open circuit voltage is good between 3.0-3.4V. I replace any battery under 2.9V. Restart the PC, enter the BIOS and set the BIOS defaults. Restart the PC again, enter the BIOS and load your user BIOS settings from file if you were able to save them. Else you will need to enter the settings manually from the notes you made or photos taken.