Makivision Suddenly Went Black????

Pinball Bob

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Makivision 1425 suddenly went completely black during playing Cruisin Exotica. Pulled game board and tried in another Exotica and worked fine. Monitor has neck glow and healthy spark when I discharged. Screen is totally black when turned on. Pulled Chassis and don't see anything obvious. Any hints? Thanks, Bob.
 
Bob,

Sounds like a game board issue. Can the game board that is dark coin up? if not then did you test power on the board itself? i.e. ground the black and put the red on the power connector to the pin of an ic on the game board? Make sure to check in a couple of different places on the board? there may be a short that is preventing power to other section of the board.

if there is not power (+5), my bet would be a power transitor or resitor near the finger board.

Not sure what power the game needs but if it is standard jamma, make sure it has the +12 near the sound section and -5 volts.

Anway hope this helps.
 
Makivision 1425 suddenly went completely black during playing Cruisin Exotica. Pulled game board and tried in another Exotica and worked fine. Monitor has neck glow and healthy spark when I discharged. Screen is totally black when turned on. Pulled Chassis and don't see anything obvious. Any hints? Thanks, Bob.


Try turning up the Brightness pot on fly untill
you see a raster?
 
Bob,

Sounds like a game board issue. Can the game board that is dark coin up? if not then did you test power on the board itself? i.e. ground the black and put the red on the power connector to the pin of an ic on the game board? Make sure to check in a couple of different places on the board? there may be a short that is preventing power to other section of the board.

if there is not power (+5), my bet would be a power transitor or resitor near the finger board.

Not sure what power the game needs but if it is standard jamma, make sure it has the +12 near the sound section and -5 volts.

Anway hope this helps.

Shouldn't be the game board - he just said he pulled that and tried in another cab and it was fine.
 
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