JPILOT16

I just started with the 650 and know very little about X plane. I went thru the point of getting the APU up and going once and it all worked. I am just wanting to practice on the proline programming. When I restarted the sim, I get no power when I turn on the battery? So I can't get the APU going again. Is there some battery hookup I am missing? Also, is there any shortcut to just get the ship powered up so I can mess with the avionics?