While trimming hedges using an electrical trimmer, I cut the wire that runs the trimmer. The trimmer was running off an outlet on an outside wall of the house. Now this outlet, plus one on another wall of the house, together with the outlet inside the garage, are all dead. I looked at the electrical panel, there is no breaker that was on "Off" position. I do not know which breaker was responsible for that circuit. The panel was clearly marked with stickers like "AC", "living room", but I do not see any sticker for "outside circuit". The only one that seems suspicious is "GCFI". But this is also on "On" position, I tried switch that off then on, still get no electricity from the outside/garage outlets. How do I trouble shoot? DO I need to replace the "GCFI" breaker? Thanks!