INDIANAPOLIS — Consumer electronics chain hhgregg Inc. is going out of business and shutting down all its stores. Founded in 1955, the retailer had 220 stores in 19 states selling major appliances like washers and TVs, as well as computers and home theater systems. As of May last year, it had about 5,000 employees. Just days before announcing its bankruptcy protection filing last month, hhgregg said it planned to trim down by closing three distribution centers and 88 stores. But the move was not enough to salvage the chain.