top row number keys won't work

Hi! I think you may have a bad keyboard with a crimped wire in its ribbon cable, or some other form of damage. I can't think of a software issue or a "lock" situation which would cause this. I would use the relevant iFixit guide to remove the keyboard, and see if you can flatten out any creases in the ribbon cable, and then make sure the cable plug is fully plugged in when you reassemble it. A row of keys not working is consistent with one of the wires in the cable being blocked or damaged, or with having liquid damage, so unless you get lucky with the procedure I described you probably need a new keyboard. But, alas, they are fairly inexpensive. You may want to reset the pram and pmu as well, if only to be able to say you did. Good luck!