iMac doesn't recognize USB keyboard

AppleInTheMud

macrumors 6502
Original poster
Jun 19, 2012
426
120
Vojens Denmark
I have had some issues the last days. My iMac is from ultimo 2013. 3,2 GHZ i5

It suddenly freezes and when I reboot the hard way it now doesn't always see the keyboard. USB keyboard - I dont like the Bluetooth one.

What could be wrong? I puzzled