Traced issue with no power back to a loose connection on a main meter lug for an incoming hot leg from power company. Tightened this connection and issue with intermittent no power was solved. However, there is corrosion in the meter socket due to loose connection over the years. I made up an estimate for replacement of meter socket. Replaced a 3 way dimmer switch in hallway. Adding a grounding acorn lug to main ground bar outside. All issues resolved.