So this Flintstones pin, with the power on got the solenoid voltage briefly touch a switch and took out column 6, and guessing something else.

I don't have the machine but I have the mpu and driver board

The following is me looking at the WPC-89 MPU layout on Pinwiki, couldn't find a WPC-95

Wanting to sort out why column 6 isn't working.

1K resistors and caps test fine

Bench testing the ULN2803 (U29) I get pulsing High on all column pins but 6 which shows High, so pin 13, pin 6 shows Low. This is another ULN2803 but tests the same.

So tested U14 next and pin 16 (column 6) is Low, but oddly so is pin 12 (columnpin 15 (column 7)...... yet shows pulsing High on pin 11 U20 (ULN2803) ?

Tested U14 in an IC tester and it's fine.

I see that U14 traces go to U22, but in the manual I don't see what it actually is.

Not sure where to go next?

Any help greatly appreciated.

checked U23 and sure enough pin 6 (column 6) was low whilst the others were pulsing.

couldn't source 74HC4514 IC's in OZ so Ebay was next option.....so will report back later.

Cheers!

replaced the 74HC4514 and now get high pulsing on all column pins, thanks for all the help