Working on my ms pac stand up cab. The board was 100% working..solid!....it was setting out of the cab in my arcade..just setting there untouched..it worked perfect yesterday....i put it in my ms pac cocktail, which has a bad board, to do some monitor adjustments to the cocktail monitor.
Anyway...i put the working stand up board in the cocktail and it wont boot up..its in a boot loop....but for a flicker of a second i get the "ok" text......so i take the board out...reseat everything...still in a boot loop.
So i then take the ribbon cable off...take the z80 out of auxiliary board..put it in the spot where ribbon cable was and no more boot loop and goes to the pac man screen but its an all white maze.....now, i never did this ribbon cable/z80 replacement test before and ive read the game supposed to look odd so i figure the white screen is part of the odd look.....so i put it all back together as it should for ms pac and the screen comes up but again, its all white as u can see in the pic....
So i shut it down for the day and will work on it again next weekend...i wanted to post this now to see if anyone had any suggestions what to address first.
It is not the monitor...i put the board in the stand up and the cocktail and both images were the same...the characters have color but its all whitewashed.
Again, it was a perfectly working board..out of the blue this happens.
Its not auxillary card or ribbon cable...i used another working set and got the same whitewashed result.
Anyway...i put the working stand up board in the cocktail and it wont boot up..its in a boot loop....but for a flicker of a second i get the "ok" text......so i take the board out...reseat everything...still in a boot loop.
So i then take the ribbon cable off...take the z80 out of auxiliary board..put it in the spot where ribbon cable was and no more boot loop and goes to the pac man screen but its an all white maze.....now, i never did this ribbon cable/z80 replacement test before and ive read the game supposed to look odd so i figure the white screen is part of the odd look.....so i put it all back together as it should for ms pac and the screen comes up but again, its all white as u can see in the pic....
So i shut it down for the day and will work on it again next weekend...i wanted to post this now to see if anyone had any suggestions what to address first.
It is not the monitor...i put the board in the stand up and the cocktail and both images were the same...the characters have color but its all whitewashed.
Again, it was a perfectly working board..out of the blue this happens.
Its not auxillary card or ribbon cable...i used another working set and got the same whitewashed result.
Attachments
Last edited:



