I have run into this problem before, and have not really found a solution, "yet". You can try moving the start up speed in the Naza assistant, to it's lowest position. The cutting off after a few seconds, is normal. Once you give it some throttle, and hover, it will change some. I've got a little 250 mini right now, that almost hovers at startup, and that's with Naza set as low as it can go. Once I lift it off, it hovers at half throttle. I'm thinking it's something to do with the startup setting on the ESC's. However, this particular mini, has a ZTW spider 4 in 1 ESC, and I can't get into the programing mode, "yet". All part of the fun.:tennis: