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Repair manuals and information for the Microsoft Surface book line of laptops.

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Resetting/replacing corrupted UEFI Bios?

Hi there

Recently my surface book downloaded an automatic firmware update which bricked my device. Microsoft are denying responsibilty so I am looking into alternative ways of fixing it (there’s a whole thread about the issue linked here, several others have the exact same issue)

So I have two questions:

  1. Would it be possible to reset the bios by unplugging the main battery inside? (Similar to removing a cmos battery on a desktop motherboard)
  2. If the above answer is no, or a reset does not work - which chip contains the bios on the surface book (As I saw there were several flash chips on the teardown guide) and where could I get a suitable replacement?

Thank you in advance!

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Same happened to my surface laptop 3. Microsoft isn't refusing the fix it. They want 400$. And that was the last time I ever bought a surface product.

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Removing the battery for a few minutes should definetely reset it.

You could also try the ‘‘hold volume up+press power button’’ before you start digging for the battery.

With either one of these you should be good to re-configure your bios.

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Thanks for the answer!

I've tried the button combination - does not work unfortunately (this all happened after a firmware update, so I suspect the bios could be corrupt).

I'll open it up, unplug the battery and update you on how it goes!

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@rtxd I hope you fix it nice and ez :)

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how did it go?

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Not great to be honest.

I managed to take it apart (busted a few components in the process, but I expected this).

I unplugged the battery but plugging it back in after some time did not change the outcome.

After a bit of research, it turns out that the firmware update caused the bios data on the eeprom chip to go bad. Which means doing a 'hard reset' to the bios won't change anything, since the back-up (on the eeprom) is also shot.

I then attempted to reprogram the bios chip myself manually, but it was too difficult to get to the chip on the motherboard since it is a surface mount component.

So in other words - Microsoft pushed a firmware update that bricked my device....

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Were you able to get it working again? I think I am facing the same issue you.

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No u replacing battery wont work because its not UEFİ battery its a Normal battery to fill the fuel! You might need to check the No Bootable Device (i would give a link but that link is only for my Surface Go and SG2. You might need to look yourself the nobootable device pages!

Btw try to install Windows,Linux,Opendiana or whatever if it doesnt even boot then the only thing i know 8s to replacing the motherboard

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RT-XD será eternamente grato(a).
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