For future reference, when a coil locks on, it often shorts the diode on the coil as well as the transistor. Diodes are cheap. Because you must disconnect one side of the diode to properly test one, it's usually easier just to replace it rather than test and reconnect the diode if it passes test.
Also, you should test transistors before replacing. Pin wiki gives easy directions on how to test a transistor with a meter. Changing known working transistors is not usually done.
If you changed the transistor and it locked on again, the diode on the coil was likely bad. Now the transistor and the diode are both likely shorted. Test and replace both.
Did you make the corrections to the manual above? (J9 for J8) Either way, if you haven't already, make sure the wire colors listed for that coil match up. Especially the blue/green wire. If the blue/green wire is disconnected from the driver board and the coil is still locked on, that wire is shorted to ground somewhere. Not likely.
Willington, DE
