Wireless keyboard stopped working caps lock light does not come on but on mac mini unable to log in

Any help out there would be appreciated. Never had this problem before until now.. Mac mini was asleep. pressed space bar on keyboard.. machine woke up now i can't type anything. restarted the machine and now i can't log in. can only do it through my mbp with screen sharing.

For troubleshooting and emergency booting where BT may not
work, a wired USB keyboard is recommended, as spare/backup.
A windows keyboard can be OK to use, if you don't have one
and end up borrowing one from a neighbor, see link to compare.
If you are familiar with windows or also use BootCamp, there
is an article about keyboard use and mapping those k/b here:
•BootCamp: About keyboards and key assignment for MS Windows
http://support.apple.com/kb/ht5636
I've almost always had at least one extra, new or spare keyboard.
Good luck!

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