How You Reboot a Sound Devices 688
Don't Wait: Press and Hold The Menu Button For 10 Seconds To Automatically Reboot
So the problem was that I could not operate the Sound devices 688 and turn off the unit. Even with all the power inputs like NP1 and AA batteries the unit stayed on.
This was triggered by a trying to playback a file on approved media and on a freshly formatted card which was odd.
The solution is so simple and in the video to give you a better example.
Hope this saves you 688 users some trouble :)