Do the lights come on when the key is on? (assuming you have any) If so do they stay on when you try to start it? If so you probably have a bad starter or a bad big wire connection. If they come on and then go out instantly when you try to start it then you probably have a bad big wire connection even if they all seem tight. Loosen each one, move it a bit, and tighten it again, then try it.
If nothing works at all then put a voltmeter across that battery and like the guy says, check fuses or breakers.
I'm not familiar with that machine so I can't say any more right now.