nintendo vs unisystem board issue

mohawk640

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Donor 4 years: 2015, 2017-2019
Joined
May 2, 2010
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Chicago, Illinois
i am have a board issue i had super Mario bros in it. then it reset it self i took the board out re set the chips nothing now i get a black screen ? i try my hogans alleys board same thing black screen any idea bad wire ? fuse ?
 
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