Keyboard and mouse not responding in pre boot

Hi

The BitLocker key is a string of 48 numbers...

""

BitLocker Drive Encryption Recovery Key 

To verify that this is the correct recovery key, compare the start of the following identifier with the identifier value displayed on your PC.

Identifier:   12345678-ABCD-1234-ABCD-1234567890EM

If the above identifier matches the one displayed by your PC, then use the following key to unlock your drive.

Recovery Key:

01234567-89101112-13141516-17181920-21222324-25262728

If the above identifier doesn't match the one displayed by your PC, then this isn't the right key to unlock your drive.

Try another recovery key, or refer to https://go.microsoft.com/fwlink/?LinkID=260589 for additional assistance.

OR
https://support.microsoft.com/en-us/windows/finding-your-bitlocker-recovery-key-in-windows-6b71ad27-0b89-ea08-f143-056f5ab347d6

OR

"" they found their recovery key in their Azure Active Directory account. ""

""

@anne_droid​ 

hi,

thank you for your response, here i am not facing the issue with BitLocker recovery key I have the matching recovery key. The problem is to enter the recovery key, keyboard and mouse are not responsive/working. Without keyboard working how can I even enter the recovery key 

Hi

Well my first thought was OSK On Screen Keyboard, and also the TAB key.

Obviously I also thought of the recent faux pas from MS where an update disables said keyboard and mouse.

https://support.microsoft.com/en-us/windows/mouse-and-keyboard-problems-in-windows-94b4ca7b-4f2f-077e-4eb4-f7b4ecdf4f61

I would use (as done before) Linux Mint to boot and then use the 48 numbers to access the data, make a backup and then proceed from there.

BUT I do tend to write the BitLocker key on a piece of paper, when I find it.

Would putting the old ram back in place make a difference.

We have same issue on OptiPlex AIO Plus 7410, BIOS was on  1.26.1 upgraded t0 1.30 but the issue persists.