nintendo vs uni system board

mohawk640

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Donor 4 years: 2015, 2017-2019
Joined
May 2, 2010
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Chicago, Illinois
i pick up two vs uni system board one has hogan's alley on it i put it in my arcade it come on but there is a buzzing noise what can i do to fix that ? and the other board has vs baseball has two set of chips one not coming up just a black screen and the other chip comes on and flash some crazy puzzle thing. any idea what i can check or fix to get them to work thanks Ryan
 
i forgot to say is that i have a vs super mario bros that how am checking them
 
the vs base ball work before and i ask this guy about it he switch the chips a around on the board now i get nothing . for the vs baseball
 
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thanks and the buzzing noise is not having the gun hook up for hogan alley ?
 
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