Robotron ram error 15

freebeer

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Boots up with RAM ERROR 15 and continues to play fine. I want to check and replace RAM #15 right? How do I find #15? Count 3 across and continue to the next row, or, count 8 down and continue from the top of the next column? Which RAM chip needs fixin?

Maybe I am way off and the error means something else?
 
WilliamsRAM.jpg
 
Ther error codes are by bank then chip. So 15 would be bank 1 chip 5. Or if you look at the picture above, Chip 1O (That's chip one - oh not one - zero).

ken
 
Following your direction, I grabbed a parts board and replaced #15 with an old chip. It booted up worse and did not continue to play. I tried another 4116 and it is working perfectly. Thank you guys for the awesome help. Piece of cake.
 
Yeah..williams boards make it really easy to troubleshoot most times...if your using 4116's get yourself a good stock..they go bad often...nice to have lots of spares on hand to swap in..:D
 
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