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Can't enter pin
I was suddenly unable to enter my PIN on the login screen both at boot and restart. Nothing from the keyboard at all. I swapped keyboards - nothing. I followed my newly gained knowledge to delete...
Even though you swapped keyboards, sometimes the USB ports can act up too. If this happens again, try plugging the keyboard into a different USB port, especially a USB 2.0 port (think back to the older ports).
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