Solution FOUND!
Hi all, I have found the solution in the Google Product Forum.
https://productforums.google.com/d/m...U/TM7Ks4rJAAAJ
"If you are trying to get into recovery mode, and see an android on his back with No Command, then press and hold Power, then tap Volume Up once, then release Power. This will display the Recovery Mode Menu.
Do not hold power too long, and do not hold both power and volume up waiting for the menu to come up. These action will cause the Nexus to reboot. It is actually the transition of Volume Up going from pressed to not pressed while power is pressed that forces the menu to be displayed.!