My son-in-law replaced the "innards" of 2 of the 3 switches in a wall receptacle. The next week, the third switch quit working. I ended up having to call an electrician. He said something in the fixture had been "pushed down", he "fixed it". He never looked at the receptacle although I told him about my son-in-law's fix. The service call took 5 minutes and cost me $125. At any rate, many of the switches feel "empty" to me and I wonder if it would be best to have all receptacles inspected in my 20 year old house. Don't need them to continue to stop working one at a time. (Should I call the electrician back to fix the light he thought he'd fixed? Been about 2 weeks)?