This is a real puzzler... ...yesterday we lost a "circuit" in the house. I say "circuit" since the affected items are all over the place: 2nd floor - hall lights 1st floor - front hall lights, living room outlets, outside lights basement - some overhead lights ...all no longer worky. I checked the main panel, all breakers OK. To be sure I reset each breaker (off then on) several times, no help. Next I checked each breaker to see exactly what was connected to it (since the legend printed on the panel was a little cryptic), in an attempt to determine which breaker is controlling the affected circuit. Each breaker was verified working properly (stuff went out and came back on as each breaker was toggled). After completing this exercise I still have no clue to which breaker(s) the affected circuit is linked to. FYI - My panel has no GFI breakers installed. All house appliances are working normally...no dimmed lights or other weirdness. The house was built in 1973, has modern wiring and one panel box. In my past experience electrical issues were always pretty simple to solve, this one has me stumped. What am I missing?