So I bought the internals to this Black Widow and since I happen to have a complete BW, I decided to try out the monitor and PCB to see what they do. The good news is: The monitor looks great and works great. Colors are bright. Very good deal on that thing.
The bad news is: The PCB is a no worky. I've never seen one behave this way so thought I'd ask here before proceeding with troubleshooting the thing. As soon as I fired it up I heard a loud and fast clicking which I thought was the counter clicking through rapidly like a machine gun. But I turned out to be mistaken....it was actually a mechanism in the coin-door itself that was repeatedly clacking like that. Apparently it's a coin-lockout mechanism. And for each click, both player start buttons are flashing at the same speed. And there's no display at all.
Is this a watchdog kinda behavior? Any tips on what to do to check it further? I can start blindly swapping chips to it from the working board at least for the ones that are in sockets. But that seems not very elegant!
Someone has suggested that I need to check the voltage at the PCB which I have not had a chance to do yet. I know my other board works fine in the cabinet but I'll check that anyway.
The bad news is: The PCB is a no worky. I've never seen one behave this way so thought I'd ask here before proceeding with troubleshooting the thing. As soon as I fired it up I heard a loud and fast clicking which I thought was the counter clicking through rapidly like a machine gun. But I turned out to be mistaken....it was actually a mechanism in the coin-door itself that was repeatedly clacking like that. Apparently it's a coin-lockout mechanism. And for each click, both player start buttons are flashing at the same speed. And there's no display at all.
Is this a watchdog kinda behavior? Any tips on what to do to check it further? I can start blindly swapping chips to it from the working board at least for the ones that are in sockets. But that seems not very elegant!
Someone has suggested that I need to check the voltage at the PCB which I have not had a chance to do yet. I know my other board works fine in the cabinet but I'll check that anyway.

