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Hello friends, how are you?

 

I have a PIN2DMD evo here not working with real pinball machines. But with virtual pinball setup works ok!

 

I tested another displays from the same batch and they are fine.

 

I'd like to know what I need to investigate. Should I suspect the 74LS123D?

 

Thanks!

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21 minutes ago, lucky1 said:

If you have a look at the schematics you can see that the circuit around the LS123 is connected to PIN9

I just checked all traces with the board file and they are correct. I don't have bad traces.

 

Is it possible to check the 74ls123? Also, if somebody connect/disconnect/invert the ribbon cable at j2 with the display on, it could damage the 74ls123?

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2 hours ago, goredaimon said:

Is it possible to check the 74ls123?

 

Yes with a oscilloscope or a logic analyzer.

 

2 hours ago, goredaimon said:

Also, if somebody connect/disconnect/invert the ribbon cable at j2 with the display on, it could damage the 74ls123?

 

No

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