It's been happening only a few times. I turn off the engine, not pulling the key out right away, and the radio goes blank. Usually the radio turns off when I open the door. I put the key back into the ignition and tried to turn everything on, but nothing. Waited less than a minute, tried again, power was back on. Radio pre-sets were still good but the clock wasn't. Time had changed. This was a total loss of electrical power. Any ideas? Ignition switch, starter? Battery was replaced less than a year ago.