pacman humbar prob or sometyhing else??

nuckinfuts68

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picked up a pacman yesterday that has a mspac pcb in it. got it up and runnin last night and seen what i thought was the normal humbar wave typical to pac cabs. well, decided to throw in my jr pac pcb in and the wave is not there. mspac yes, jr pac no.

so, i'm guessing it's not the humbar prob but something in the mspac pcb.....am i correct........and if so, what would cause this prob.

thnx in advance for any and all help.
 
picked up a pacman yesterday that has a mspac pcb in it. got it up and runnin last night and seen what i thought was the normal humbar wave typical to pac cabs. well, decided to throw in my jr pac pcb in and the wave is not there. mspac yes, jr pac no.

so, i'm guessing it's not the humbar prob but something in the mspac pcb.....am i correct........and if so, what would cause this prob.

thnx in advance for any and all help.

Could be the caps on the gameboard, but it still could be the usual suspects. For whatever reason...the edge connector could "bite" the Jr. motherboard better than the Ms. motherboard. Also, try cleaning the Ms. motherboard's edge "fingers".

Edward
 
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