Hi,first you need to check if fuse has not been blown out.Because when POWER comes back after an outage there is a surge voltage flowing through electrical lines.It is advisable that when their is a POWER outage you have to turn off your FUSE box or SAFETY box to make sure that it won'tdamage appliances when POWER comes back>Technically when POWER SOURCE or SUPPLY has been shut off for a period of time.When POWER is back, expectantly there is an abnormal flow of current/line; current will not be as stable until a period of time..AC current behaves like a wave,values changes from time to time especially when POWER SOURCE has just been TURNED ON..So better turn off FUSE BOX when experiencing POWER OUTAGE so that when power comes back SURGE VOLTAGE wont flow within the circuit>Hope this helps..
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