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Beginner
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Impossible to Downgrade BIOS on NUC7i5BNH

I am running my NUC with BIOS .050 and want to downgrade it to .047

No matter how I try to downgrade, it seems impossible for some reason, even using the jumper method.

I was on BIOS 51, tried to downgrade to 47, as it has the previous UEFI graphics, but the BIOS says that it's incompatible BIOS (despite it still has the same ME version).

Tried to downgrade to 50 - worked.

Tried from 50 to 49, incompatible.

Tried the F4 method - getting blank screen when booting, doesn't do anything (tested on 4k TV or 1080P monitor).

Tried removing the security jumper (following the exact instructions https://www.intel.me/content/www/xr/en/support/boards-and-kits/000005532.html here) - getting blank screen when booting, doesn't do anything (tested on 4k TV or 1080P monitor).

I have asked other members in the NUC forum and they have the same results.

Is there any way to downgrade to .047?

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Novice
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I have the same issue when I try to downgrade. Within normal flash process it says, the old BIOD is not compatible. When using recovery mode it behaves like you described.

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Community Manager
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doclucas: Thank you very much for joining the Intel® NUC communities. We are sorry to hear the process to downgrade the BIOS is not working.

 

 

I checked the released notes and there is no information stating that the downgrade is not possible:

 

https://downloadmirror.intel.com/26992/eng/BN_0049_ReleaseNotes.pdf https://downloadmirror.intel.com/26992/eng/BN_0049_ReleaseNotes.pdf

 

 

Even though you mentioned you already tried the BIOS recovery, just to make sure, did you follow the steps showing on the link below? There are 2 methods to do the recovery:

 

https://www.intel.com/content/www/us/en/support/boards-and-kits/000005532.html https://www.intel.com/content/www/us/en/support/boards-and-kits/000005532.html

 

 

Here is the link for the 0049 version:

 

https://downloadcenter.intel.com/download/26992/BIOS-Update-BNKBL357-86A-?product=95067 https://downloadcenter.intel.com/download/26992/BIOS-Update-BNKBL357-86A-?product=95067

 

 

Any further questions, please let me know.

 

 

Regards,

 

Alberto R

 

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Beginner
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Yes, Alberto, as I wrote in my first post, I tried the F4 method and the Jumper method.

Have you tried it yourself? I am sure that if you will try it after you have version .050 you will be able to reproduce the same issue I am having easily.

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Community Manager
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doclucas: Thank you very much for providing that information. Yes, I tried this process already, with a different model of NUC but same family, it was the Intel® NUC7i3BNH. When using the F7 method I got the same error message you mentioned previously, but when I did the BIOS recovery by removing the jumper, it worked and I was able to downgrade the BIOS to 0049. That is why I just wanted to make sure you were following the right steps.

 

At this point, I will do further research on this matter and I will try to replicate the issue using the same exact model you have, as soon as I get any updates I will post all the details on this thread..

 

 

Any questions, please let me know.

 

 

Regards,

 

Alberto R

 

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Beginner
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Alberto, while the NUC7i3BNH is a product from the same family, it is quite different.

I own 2 NUC7i5BNH and know 3 friends who own the same model, 1 of them here in Thailand and 2 in another country. None of us is able to downgrade.

I also asked around in the forums, nobody is able to downgrade.

If you are able to downgrade NUC7i5BNH from BIOS .050 or 0.51 to any lower version, using any of the suggested recovery methods, I'd be extremely surprised.

Kindly post a video showing how you successfully did that.

Otherwise, kindly provide the steps to downgrade. Maybe a new BIOS your engineers should "bake" to fix the downgrading limitation/problem should be provided? Or any other way?

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Community Manager
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doclucas: Thank you very much for letting us know those details. Sure, I will try to replicate the issue and as you mentioned, I will post a video or at least the steps that I did in order to do the downgrade. As soon as I get any updates I will post all the details on this thread.

 

 

Any questions, please let me know.

 

 

Regards,

 

Alberto

 

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Beginner
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Alberto, I believe trying to replicate the issue should not take over 5 minutes. Simply removing the jumper and you will get the same results as mine.

Why does it take so long to get any kind of proper support on these forums? Please don't tell me you don't have access to this model or that you have been on vacation.

Can you confirm you could reproduce this problem so that we can move forward with support case numbers and resolve this!?

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Moderator
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doclucas, all the NUCs in the NUC7 family use the same BIOS, so there shouldn't be any difference.

About your issue.

1. You will only be able to downgrade to BIOS 0049 due to an ME change. I added that information to the download record.

2. I had the same problem as you, there is a workaround. Please see the note I added to the very end of this article: https://www-ssl.intel.com/content/www/us/en/support/boards-and-kits/000005532.html BIOS Recovery Update Instructions for Intel® NUC

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Beginner
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cvare

1. Your release notes show the ME version is exactly the same even on .0047:

https://downloadmirror.intel.com/27157/eng/BN_0052_ReleaseNotes.pdf https://downloadmirror.intel.com/27157/eng/BN_0052_ReleaseNotes.pdf

ME version is 11.6.27.3264 since BIOS .0047.

Regardless I am unable to downgrade to .0049 even

2. Which workaround do you refer to? The full format? I am not even getting output on TV/monitor with the jumper removed. Did you try to downgrade to .0049 from .0050 using the jumper method? If so, can you share that video please?

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Moderator
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1. Yeah, sorry, wasn't the ME, but a security update.

2. Me as well. No picture whatsoever. Once I did a non "quick format" it worked.

Give it a shot and let me know.

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Beginner
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I did give it a shot before cvare

I tried with full format of FAT and FAT32, neither worked (2 different USB2 DOKs)

You say it works for you tho, would love to see that video showing the process from start to end...

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Super User
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cvare, formatting the USB as you suggesting in this case will not help, as doclucas is informing you that he had successfully downgraded the bios from version 51 to 50. That means that not the USB formatting causes his problem.

Leon

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Beginner
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lw1948

Nice year, Leon.

I also don't think it is related to the formatting, but not because of the reason you mentioned, as I was able to downgrade from .0051 to .0050 via the normal firmware update option in the BIOS, not via recovery.

My reason is because I tried that formatting before the post and got the same results.

Also nobody is able to get it to work and I still haven't seen any video that proves it does work this way and the exact steps to make it work, so still waiting to see that video cvare

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Novice
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I'm very curious on this topic. I'll downflash my 052 to 049 and report back shortly.

Well I'm pretty good with these NUCs and I must report it is impossible to flash down to 049 from 052. I tried jumper recovery method, power button down flash, even a normal F7 flash.

Not a chance. They all give me a black screen and or message about invalid flash file detected. So yes, it appears it's impossible.

I'd like for anyone to prove me wrong. Good luck guys!

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Beginner
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I'd like for anyone to prove me wrong.

That.

Or provide a new firmware that fixes the recovery not working issue, without updating any other components that will prevent downgrading to even .0049

Intel, Intel, anyone there?

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Super User
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Hi doclucas,

I just founded that in bios release notes: https://downloadmirror.intel.com/27157/eng/BN_0052_ReleaseNotes.pdf https://downloadmirror.intel.com/27157/eng/BN_0052_ReleaseNotes.pdf , under version 50 there is a following note:

New Fixes/Features:

 Security enhancements.

 Add the setup option "Allow UEFI Third Party Driver loaded".

 From BIOS 0050 and newer it will not be possible to downgrade to any BIOS version earlier than 0049.

So, I think this is a answer to your question.

Regards

Leon

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Beginner
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Thanks, Leon, that's not it.

By the way, cvare wrote it just a few posts before:

1. You will only be able to downgrade to BIOS 0049 due to an ME change. I added that information to the download record.

He just added this information.

But in any case, we are unable to downgrade to .0049

Recovery doesn't work at all, it shows blank screen.

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Moderator
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I did NOT just add this information.

I will say that I added within the last month as we normally don't post that, because of this:

"Downgrading the BIOS to an earlier version is not recommended and might not be supported. An earlier BIOS version might not support the latest processors, bug fixes, critical security updates, or the board revisions currently manufactured." https://www-ssl.intel.com/content/www/us/en/support/boards-and-kits/000005532.html BIOS Recovery Update Instructions for Intel® NUC

BUT because of the flashing issue I was willing to see if it was a BIOS issue.

Regarding the flash itself, I agree. I was having this problem myself, until I used a non quick format. That was Wednesday. Yesterday I was having the same issue, where it would not work, while I tried to record a video for you.

I am working on figuring this out, if possible, and if not, I will open a bug.

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Beginner
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I did not mean you just added it at that moment, I meant it was just added recently, but regardless, I am sure it wasn't there last time that I checked (which was very recently) and definitely not when I downloaded the firmware.

It's irrelevant to our discussion tho.

The point is that it doesn't work. You weren't able to record a video proving it can be done, because it's impossible to get it to work. I am a hardware and software engineer with years of experience and could not make it work on multiple NUC7 devices, so I am quite confident it's pointless to try to figure it out at this stage.

Opening a bug, tho, yeah that will hopefully help resolving this, and the sooner the bug report is filed - the better.

Thanks

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