Any Orville will be very old by now.
Certainly could be the battery.
But, first try re-initializing everything ( 8 key at startup – see UM).
Dit that ‘power on +8’ routine 4 times. Nothing! All I get is the same message “I sense a new RAM …..formating yes or no?” then “Remote operation only”Show More...
What are my chances to bring that unit back?