This is only my opinion. I did not vote on this edit. Take any applied upvotes/downvotes to judge whether it is a common opinion or not.
I can only guess here, but this question is so low on information to begin with it should be closed and deleted rather than edited.
If it were a new question, we would advise OP to tell us more about this firmware update they attempted, more about the keyboard and mouse, whether they'd tried alternate hardware, and at the same time we would have advised them to improve the format/layout of their question.
But, given its age it is clearly abandoned. While your edits did make the format and layout of the question no longer part of the problem, there is so little actual information regarding the problem and the context it occurs within that it needs a full reworking by OP, not any of us, before we could consider it possible to answer.
The error is not on your side: your edit was fine. Just, perhaps, use your edit skills (which you have) on more deserving questions, and for ones like this, vote to Close instead.