I need some help with WPC Terminator 2 CPU board.
I try to help a friend.
So he bought the machine a year ago,but looks like the previous owner had evaded the main problem from the board somehow.
I swap the original board with another fully work and the machine works without problems.
So the problem is with the original board that came with the machine.
Here is what is happen:
1.Several lights stayed on constantly.
2.When the machine is turn on,immediately active one coil,but don't hold it.Just active it for a second.

Even with these problems,the machine is 100% work.

I put the original board on other two machine to see what will happen,and when I power them on,immediately blow fuse F105 which is solenoid fuse,but this not happen on T2 machine.

What can you suggest me for this problem?

I can see too many bad solders and one ULN2803 changed previously but no battery damage.
I think to fill the bad solders and to change the socket and ULN2803.
Also for what is juper W18,it looks like that it had it before.
Any other idea at this situation?

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Same problem after reflow.

Problems fixed.
Shorted U12 74LS240,bad ULN2803 and one LM339.
Now everything is work.