Paul-

I have had geat success turning off almost all electronic devices
through the application of percussive maintenance. Simply accelerate
your electronic device towards a somewhat higher mass than the device
itself and allow deceleration to reset the aforesaid device to an
inert state.

Rebooting may be troublesome after the application of this method. Do
not neglect gathering all of the subsets of the device and
repositioning them properly before attempting a reboot.

Mark M.