Hi,

I replaced my shell on my phantom 4, it was working prior.  I think i did everything right but now, when i startup unit I don't hear the melody, i do have power and lights at motors are working.  Question, what are possible causes that would cause the startup melody from working?

Thanks,
Larry

New acoustic insulation layer?  Are the propellers still noisy?

Many very delicate parts on boards. Any get scratched in the process?

Why did you replace the body in the first place?

Hello Larry, it is not suggested to replace the shell at your end which may void the warranty. I'll recommend to send it in for fully diagnosis and repair: https://www.dji.com/support