This is the third time I'm going to try to post, seems to keep timing out on me.

I have an e-flight apprentice I've been flying for about a month. Every now and then when I turn the transmitter on, then connect the battery Ihear the start up beeps going, but the plan does not seem to be getting power. Ican hear the low pitch electronic noice coming from the plane, but can't get the prop or servos to engage.

It happened again today after I went to change the lipo battery. When Iplugged it in it was no go.

The manual does not address this issue as far as Ican see. Any idea what I'm doing wrong ?

Thanks