Hi, Rooney
Sent you a PM message, Download this printer port tester software, see pic and we can do some testing with it.
In ports & pins set mach to Sherline 1/2 step mode, Apply, OK, Then setup the pp monitor per pic 3 & 4.
You should be able to see the pin led's flash and change State if it's working by holding the direction keys down in cont jog mode.
Chip