If it's highly repairable, I'd fix it. Then I'd sell it because I remember that game and it blows. lol By "just the audio", do you mean the game plays and you can hear the audio, but have no picture (toasted monitor?)?
From KLOV (sounds like a pretty rare machine if it's original, should get some decent coin...):
Scarcity in collections (VAPS.org)
Uncommon - There are 7 known instances of this game owned by one of our 900 members. Of these, 6 of them are original dedicated machines, 0 of them are conversions in which game circuit boards have been placed in another game cabinet, and 1 of them are only circuit boards which a collector could put into a generic case if desired.
Of the 38,314 video games (3,074 unique) tracked by the Video Game Preservation Society, this game ranks a 7 on a scale out of 100 (100 = most commonly seen, 1=least common) in popularity based on ownership records.
Wanted - We currently do not know of any VAPS members that have gotten around to adding this game to their wish list. The wish-list system is fairly new (not all VAPS members have filled one out) and there are probably a number of collectors who might purchase this game if offered one at the right price.