I had mechanical issue with sticky space bar.  Purchased another e6220 keyboard and swapped out.  New keyboard not recognized.  I triple checked connections booted a couple times to no avail.  Swapped back to original keyboard 10 minutes later.  Old key board not recognized acts the same as new one.  touchpad and usb mouse work but no keys. Mouse was disconnected when rebooting.   E6220 service tag running win10.