Did you try the GFCI with just the power wires connected?
When Leviton first came out with that green light it was to indicate the presence of grounding and the light would not glow on ungrounded circuits but the GFCI would still function. On those GFCIs the green light would glow if ground and hot were present and neutral was open but I don't know if that is the case today.
At this point a meter is really needed. Let us know what the electrician finds.
When Leviton first came out with that green light it was to indicate the presence of grounding and the light would not glow on ungrounded circuits but the GFCI would still function. On those GFCIs the green light would glow if ground and hot were present and neutral was open but I don't know if that is the case today.
At this point a meter is really needed. Let us know what the electrician finds.

