"Today I removed everything and the board from the quad. Nothing plugged in except usb. Still didn't work so I started exploring prearm checks in the parameters list. Saw that all was selected so I unchecked that. Got flashing yellow. Put back in…"

"Tried 4 cables and reset to no effect.

I did remove evrything except the usb and it started in initialization and then went to flashing yellow. I think tha means some prearm siutuation occurs.

Need to zero in.

Maybe its the board as it didn't…"

"Thanks for your reply. 

I forgot got to say that I use a Spektrum DM8 transmitter module. With the 9c set to PPM, an Orange micro, and S-BUS/Bind output it appears to correctly do a radio calibration but trying to liftoff the quad acts strangely.
i…"

"I have been tempted and may do too. Soon."

"How did you fix this? If you did."

"I have had this problem for a long time now. I don't understand why the message says "No RC Receiver" as a result of whatever test it makes. The receiver is there if an arm was attempted resulting in this message. What test failed? A better message…"

"No but I haven't been working on it. I did have a crash which may have damaged something but that error message doesn't make sense since it doesn't appear until I use the radio to arm. I'll give it another try but I have other apms which I could…"

"Anybody understand the No RC receiver message when the radio is clearly send signals to the APM (the arming was triggered by the radio sticks so how can there be no receiver?)"

"Ok I was set for UBLOX. Changed to 1 SIRF.

But now I can't download. I have done many times before.
I get :
Binary sketch size: 15652 bytes (of a 30720 byte maximum)

avrdude: stk500_getsync(): not in sync: resp=0x80
avrdude: stk500_disable():…"

"Figured out, though it is not said anywhere, that the 3 pin jumper assumes that you will solder half of a three wire female servo extension in the pc board rather than a two pin header. Then the included 3 wire jumper male plugs into the 3 wire…"