Marball madness help

partygt

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Have a mm shows white screen was wondering where to start? Everything looks hooked up. There is a switching ps in it? Thx Paul
 
hmm. Maybe start with with checking voltages on the main board and making sure the edge connectors are nice and clean on the daughter board. You may try turning the game on with no daughtercard and see if you get a message about the missing cart. That might at least tell you if the main board is booting.
 
Thanks

Thanks it's still on my truck I pick it up before work will do some checking in the am
 
update working!

reseated everything and it works. trackballs have been sitting to long and bearings are crappy. where is the best place to get 2 sets and are they standard 3in stuff?
thanks.
 

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Marble Madness uses 3" trackballs. I got replacement balls from Bob Roberts. I can't remember if I got rollers or bearings when I redid mine... or who sells them.
 
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