It may be that the Rx circuitry on the console port of your switch is fried - in that case, you're probably out of luck.
There is a slight possibility that you have configured no exec on your console port, causing it to not start a command interpreter when you hit Enter. Can you actually try to perform the password recovery procedure and see if the keyboard is accepted at least in the bootloader mode?
Unplug the switch off from the mains.
Press down the MODE button on the front panel.
While keeping it pressed, plug the switch back to power. Do not release the button - keep it pressed.
After roughly 10-15 seconds, the console should display a message that the boot process was interrupted, and suggest a number of commands to enter to continue booting. At that time, you may release the button.
Enter the flash_init command if possible. If this works, you're lucky and just the configuration was screwed.
Enter the load_helper command
Enter the rename flash:config.text flash:config.old command
Enter the boot command
If entering commands in the bootloader mode, do not use TAB, arrows or Ctrl-Key combinations because they are not supported, and will always cause a command to be unrecognized. If you make a typo, delete the whole line up to the typo, correct it, and type in the remainder of the command again.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...