low voltage electricity
[This message has been edited by myway77 (edited September 08, 2003).]
I'm suspecting that you may have a loose neutral, either in your service or in a multi-wire branch circuit.
Just because your Dad measured 125 volts doesn't mean that it is always 125 volts.
Have him plug his voltmeter into the outlet that caused the trouble. Then go around & turn various lights & appliances on & off while he observes the meter. If he finds a substantially higher reading while you are doing this, call an electrician.
Just a guess.