Question edited for clarity.
Question moved from Computers and Internet. Magic word is 'Golf'
Yes according to this it takes a 24 volt Lithium battery. Fortunately putting a 12 volt battery in won't have damaged it where as 24 volts into a 12 volt system will.
Take it to your local golf retailer and they will know someone that can diagnose and repair the electronics.
I presume you checked the battery had a full charge.
The reviews on it are good
https://www.google.com/search?q=Bag+Boy+Navigator+Elite
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