Interestingly, when entering Diags on a new PW3 running 5.6.5, instead of the Diags menu appearing in putty, it instead shows up on the PW touch screen. The menu is touch capable and one can select the same options that the walkthrough dictates.
Main menu in Diags
After selection of Reboot or Disable Diags
[Image violates Posting Guidelines for size - MODERATOR]
Putty screencap from same time.
[Image violates Posting Guidelines for size - MODERATOR]