Why only half my circuit breakers work?
You blew one leg of you oncoming power---using your tester--see if there is power on both incoming lines to the main breaker---should read 110 to ground and 220 power cable to power cable.
If you have both incoming powers the main breaker did not reset---
If you only have one power leg working---go outside and see if you have a disconnect at the meter or pole---pull the disconnect and see if there is a cartridge fuse in there that is blown---use you tester.
If you tell me you don't own a tester---I will bawl you out soundly!---Mike---
New members: Adding your location to your profile helps in many ways.--M--