Great to see you getting "in there" and playing eliminating/proving faults & scenario's etc, well done.

As long as you're confident, go for it.
Of course, when in doubt, just shout out here, plenty of the boys will be happy to guide you from their own 20-30+ yrs experience 

If i had $1 for everytime it ended up being a loose wire or dodgy connector, i'd have $1000's hahahaha.
Well, actually, i wouldn't, coz i woulda bought another pin with that kinda money 

MM.