won't turn on

Jedburgh wrote:I'm new at this, but flew a Cessna from southern CA to Portland and then from Portland to Seattle. I'm now planning on heading east, but wanted to park my plane for the night. I shut the magnetos off and then came back an hour later but can't start the engines. Any idea what the problem might be? I had left my beacon lights on and hope the battery didn't go dead... but wouldn't the strobes go out when I shut down the magnetos? So first of all... can anyone tell me what the problem might be and secondly, is there any way to advance time so I don't have to wait through the night?