Nldas3

One day car drives normally. The next day, I drove about 200 yards, all lights come on (engine. brake, exclamation mark, etc..) and lost power steering. Drive back home, parked the car, and turned engine off. When I try to turn ignition on, nothing happened. I get no lights, no horn, no buzzer sound. After having recharged the battery, car started right up. However, after turning engine off. the same thing happens. I get no lights on the board, no door buzzer. absolutely Nothing. I did get a code about power (either too low or too high). I don't recall the actual code. Could it be the starter? I don't understand why I lost power steering while engine was still running. I am confident that if I recharge the battery it will start again but same thing will happen after turning engine off. Whst would be my best course of action? Thanks