Mach3 and JK02-N breakout board

[Doddy]

Have you tried removing the parallel cable and shorting (carefully!) pin 1 and pin 9 on the BoB to 5V? (if you have one, use a current limiting resistor between the 5V supply to the pins... any value from 100R through 10k should be good... if you don't have one just be careful). If that doesn't work then I'd be serious glaring at the BoB.

[JimK]

Many thanks to all for your suggestions. Both boards have either a faulty PNP relay driver transistor or an incorrect one. Both boards are now working ok after I replaced the transistors with known PNP types.
Regards
JimK

[john swift]

Great to see you have solved the problem

John