Inspected home with backed up sewer. Located the septic solids tank and the pump tank. Located circuit in panel and power was still on to pump and had not tripped. Located septic control box in backyard on rear wall of home. The sub-panel inside control box with 2 circuits were turned off and pump switch was also in the off position. Both tanks were full so I turned on the pump power to empty the liquids. Advised homeowner to contact builder and septic company to have tank flushed out and provided estimate to snake sewer line