BFL13 wrote:
Aha thanks! I will swap those when I put a GFCI receptacle back in there.
Rather than just swapping, connect only the line terminals and then see if it powers up. If it works, turn off the breaker and then hook up the load side.
Another possible cause could be the ground wire vibrated its way over against the neutral screw on one of the downstream receptacles. Unfortunately you'll have to start pulling those to look. You can always divide and conquer by cutting half of them out of the circuit to see where to look next.