i am not one and my knowledge is very little, but heres the story. live in an older home with an addition. yesterday i come home and the wife tells me we have no power in half the house. i go down to see if the breaker was flipped in the addition, no they both said on. the main panel for the house is fuses and they all look good the plug in( screw in type) and the cartridge fuses in the main seem good when i test them. so what could this be everything seems to be in order.