Please Help... Multiwii pro.

[Jamesp123]

Hi all I am quite new to this but I have recently changed my ESC's to Simonk 30a. I'm running 4 X 2212's and I had a ESC nearly go on fire this is the reason I changed to Simonk I also had to change the motor. Anyway changed the ESC's, motor and calibrated ESC's individually then all together as in configh. Anyway my quad was flying a treat until from some reason when I connect the battery ESCs don't make a noise then after a few minutes everything turns off no oled, blue tooth, receiver. ...... but when I power through USB in Gui it strings to life. I can arm it etc see graphs working but no b power going to the motors. . Or ESC's beeping?

Can anyone help me pin point the problem?

I hope it's not my board.

Thanks in advance.

[FengShuiDrone]

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[Jamesp123]

Sorry can you explain in simple terms

[Jamesp123]

Hi Feng, just to let you know.... I took a reading across the main power off of the frame and it read 3.8v across each of the 4 power leads... is this correct?

[FengShuiDrone]

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[Jamesp123]

Perfect thank you..... plugged in another battery and all great. Thank you.. I panicked. .. are you good with GPS. ... GPS seems to be fine on GPS hold, return to home and land but will not go on mission it just seems to raise to 25m is then holds in the same position sometimes it changes heading but doesn't go anywhere.

[FengShuiDrone]

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[Jamesp123]

By the way I have a hobbyking DC4S balance charger are these okay?