Can you post a picture of the lower half of the board showing the U6 ROM and the jumpers to the left of it?
(Topic ID: 211633)
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That jumper setup won't work with the 9316A ROMs you have. Your board is jumpered for 2716 EPROMs as mentioned above which has different chip enable signalling to 9316A.
See the pic below - note my U6 ROM is a 9316A in ceramic package version. Jumpers you need are:
E1 - E4
E2 - E6
E7 - E8
E9 - E11
E12 - E36
E13 - E15
E31 - E32
E33 - E34
E16A - E19
Quoted from JethroP:Just curious...is it likely or possible that anything (i.e., my ROM's) were damaged if the board was powered up with jumpers set for the wrong ROM's?
That incorrect jumper setup cannot cause damage to the ROMs or the MPU board.
Technically, the CPU would have executed incorrect code that on a one in a million chance could have caused a coil to lock on - extremely unlikely though.
Quoted from JethroP:BY the way, I didn't mention before that on the playfield (with and without J2 and J3 connected) there are 4 controlled lamps lit; 1, 2, 3, and 4 thousand bonus points.
Someone had a similar problem a month or two ago but I can't find it.
This time disconnect J4 from the lamp driver board - do the displays now enter attract mode properly (alternating between 00 and High Score to Date)?
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