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2015年10月26日にリリースされた第4世代のSurface Proタブレット。

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CMOS battery in SP4

can you remove or unplug the CMOS battery in the SP4? Or is this not possible? thanks

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I ALSO need to reset the UEFI password on my Surface Pro 4 (I never set one in the first place but I have the error and cannot get past it) and cannot find ANY battery on the motherboard. Please help with further information about resetting the UEFI password because I have tried everything else in the article. My Surface is in pieces. I busted the screen attempting to open it but will buy another if someone can actually help me get past the UEFI password error. Your help is much appreciated, thank you!

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i also want to know where is the cmos baterry in surface book

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Is this surface book 1 situation ?

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A Surface was not built to be open. The CMOS as far as I know powers everything on the Motherboard including the time. If the battery is not charge the timer goes back to the day it was manufacture. With the time set back to that day and time.

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Hello:

I volunteer at Willow Creek Computer Connection(S. Barrington, Illinois) and we get in donated computers to be refurbish then they are given to school children. We got in a dozen MS Surface which 11 were re-image with a license Window 10. The last one has its motherboard locked by a password. With that lock on the motherboard the USB port does not work.

A MS Surface is made not to be open since there are no parts below the screen other than the motherboard and the batteries. There is no coin battery.

By re-setting the Windows 10 program I can get into the command screen, but I need to get into the motherboard to and by pass the password to make the Surface work so as to be re-image with a new license Window 10.

Any solutions on this problem?

Richard Cornell

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This machine doesn’t rely on a CMOS battery judging from the teardown. These devices typically rely on a small reserve capacitor near the Flash ROM or have a dedicated battery line to do the job the CMOS battery would normally be used for.

If you want to get the CMOS RAM to save again, you will either need to find the capacitor(s) that provide power or replace the battery.

That being said, the capacitor is usually fine and it’s typically due to a older battery. However, you may as well double check the board and 100% rule it out.

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I too require help with this, can I simply drain my battery completely and have the bios resetted?

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Remove it for 24 hours and it will lose any charge it has. Capacitors only hold power short term. Won't work on BIOS passwords but a bad checksum that needs forceful clearing will go be removed.

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Hello,

This is possible this article also included a guide.

https://www.windowspasswordsrecovery.com...

Your problem isn't about passwords but you have the same goal as the above mentioned article goal of resetting the BIOS if I am not wrong.

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I just followed all of the instructions in this article and have finally torn apart my Surface Pro 4 looking in vain for the CMOS battery. I cannot find one. This article is not legitimate as there is no button cell battery as pictured in this article on the motherboard. If there IS a CMOS battery can you please tell us where it is located?

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I have taken a dozen of these units apart and never found a coin battery. These Surfaces are made not to be taken apart. The newer models have only a motherboard and the batteries below the screen. The SSD is on the motherboard and can not be remove. Unlike the older ones.

The older models had a removable SSD, the newer model everything is on a motherboard. Unless you have a new replacement MB it is not worth anyone trouble to open the Surface.

If your told it can be done then then your going to pay big dollars to have it done. Just look at your electronic watch.

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Ian さん、ありがとうございました!
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