Wrong? Well aren't you the clever shite, answering your own question? I eagerly await your next problem being posted ad nauseum.
Possibly, and I might be mistaken, it may have been better to have phrased this last post along the lines of the following:
"Thank you, everybody, for your helpful suggestions, I have traced the fault to the NVRAM."
Just a thought.
And, to answer your initial question, there is a code to reset the usernames and passwords.
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