Add basic troubleshooting step when lock cannot be acquired

[bparks13]

For all port controllers, if communication lock cannot be acquired add a line with the basic step of "Confirm the headstage port is turned on".

Fixes #496

[aacuevas]

Regarding the manual voltage message, I'd write something like
"If the problem persists, you may need..." or something

Make it clear that port checking should go first. Writing a big value there is dangerous, so we need to make it clear that it's not something to try lightly

[cjsha]

imo, the wording should be more severe or suggest more caution than it currently does.