Well, well, well...
I've spent part of the afteroon yesterday replacing the playfield of this machine... I had to do it, it was totally burnt on some parts...
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And doing this, I discovered that some connections had been... let's say "modified"
IMG_20150521_212410527.jpg
So I checked all of that, noticing that some of the welding done could touch the pin next to it.
I thought this could probably be the origin of my problems..
But once I had finished all of that, the issue was still here.
So I checked the +5 supplying the CPU board, and it was a 4.9, so I adjusted it. No change.
and the ground is all good.
SO, a few things to be noted :
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* the red led on the left hand board (?) is on when i start it, but doesn't flicker.
when i booted with the cpu board unconnectd, it did...
* the Eproms seem not to have stickers on them anymore (well, actually, that's a fact).
Could it be the problem??
Quoted from Pinthetic:
Power down and disconnect the connector between the MPU and the driver board and power it back up again. Let us know what it does in each case.
Is the driver board the one below the cpu board?? (I'm sorry, the tech doc i have is only 20 pages long, so I lack a lot of the data on it...)