FMU B/E LED when powering thru PM

just want to get a clarification of it.

when powering thru USB, FMU B/E LED is off.

when powering thru battery-PM, the LED is slightly on (on but DIM)

I wonder what might the problem be and what does it mean. if it is safe to fly as is

when powering thru USB, FMU B/E LED is off.
This is normal

when powering thru battery-PM, the LED is slightly on (on but DIM)
This is normal. You are actually seeing the power LED bleeding over to the B/E LED

I get the same. When you say [quote] power LED bleeding over to the B/E LED [/quote] do you the green light or the voltage?
Yours Simon M.

I’m having the same issue, I don’t think it is the power light bleeding over as I would think that it would dimly light the B/E green. My B/E is lit amber but only when I use a battery to power the system.

do you the green light or the voltage?

the light

I’m with this light this is normal? and safe to flight with this ? only when battery plugged.

Check attached file…

Thank you for help. :smiley:
[attachment=0]rps20140720_093557_172.jpg[/attachment]

I also got this problem :question:
How can I do

I have asked 3DR support. According to them, this behavior is normal and does not signal an error.

So this is a bug or feature on their side.