Im having this random shut down issues with the HV 6.5 pro..and emailed novak for enlightenment..this was the reply.

Hello Sir,
I see, I think I just realized the issue.
The instruction manuals for the HV Pro has a Mistake. Particularly with the Lipo Modes. It’s backwards.
It Says: One Blink is ON, two is OFF. THIS IS WRONG.
IT operates as One Blink is OFF, two Blinks is ON.
So most folks that have pointed out this issue are simply following our “wrong instructions”.

Thank you for your email. If we've missed any of your questions please let us know.

You can find complete information on all Customer Service Return procedures in the Customer Service Section of our website. All Manuals that are currently available are located in the Download Section of our website.

Thanks

Tech Support

Novak Electronics

17032 Armstrong Ave

Irvine CA 92614

Ph# 949-833-8873

Fx# 949-833-1631

NOW..HE WAS RIGHT..BUT THE RANDOM CUT OFF/SHUTDOWN STILL HAPPENS. I HAVE DONE EVERYTHING TO THE RX/TX ADJUSTMENTS AND MODS, ESC PROGRAMMING,EXTERNAL RECIEVER PACK AND SUCH..BUT STILL THE SAME RESULTS. i BOUGHT ANOTHER HV PRO AND STILL THE SAME, 2 OF MY FRIENDS HERE HAVE THE SAME HV PRO AND WITH SAME RESULTS. ANY IDEAS? NOTE: MY OLD NON PRO HV'S ARE WORKING FINE. THANKS!