Hi.   I’m baffled.   The pool lights will not go on.  There is a click sound in the AquaLink box.   The GFCI outlet connected to AquaLink RS doesn’t give electricity to either plug.  I replaced it....same issues.   Voltage tester showed power (pic).  I flipped the breaker several times.   But test and reset buttons doesn’t work.   There is a PX100 transformer.  That’s mystery box to me.

Any thoughts on what I can try?

All the best.