Solinoid is fine, it wont fire if its screwed.
First reset the board to factory settings.
Then check your trigger settings, trigger might be stuck in the firing position.
Next, de-gas the marker, make sure it has NO air or paintballs in the breech.
Leave it on and try to fire it,
if you cant hear the microswitch click when you press and let go of the trigger,
your trigger is stuck and/or your trigger screw settings needs revision.