For the second time I have found a GFCI recepticle that tests as expected, both using the internal test and an external tester, and that supplies power to its own outlets but does not supply power to the load terminals. So the protected outlets connected down stream of the GFCI receive no power. When this happened the first time a year or so ago, I thought this was either a unique failure in the particular GFCI device or something I missed in testing. Power restored, homeowner happy, so did not investigate further. Now I find another, and this time tested more carefully. The local outlets are both powered but the load side is dead. Have I just been unlucky twice, or is there something inside the GFCI that separates the load line from the local loads and that can fail separately from the rest of the device? Anyone else see this problem? I don't do much of this kind of work so wonder.