when I connected to Betaflight, it showed "no valid receiver signal is detected".

Long time ago I burned my quad and left it for a long time.I wanted to fix my quad. motor FC ESC all broken.So I bought new motor FC ESC and capacitor.

I'm sure DJI remote controller connected air unit, because both showed green, camera is fine as well. I also can play Liftoff with my remote controller.

Should I buy a new DJI FPV air unit(without camera)?and when I watch DJI FPV goggles, there is a quad icon on the bottom-left corner, Does that mean signal or battery? and why is undulate?I changed another battery but still undulate.and when plugging the battery, a few seconds later it will show lower battery on the bottom-right.

https://www.youtube.com/shorts/ivAGorMXCSY

need help~

oops, I'm stupid, after setting port and setting ARM mode, I can unlock motor with remote controller.

I think because of connecting Betaflight, the goggles show low-power mode.

I disconnected Betaflight and it worked fine.

skyjerry149 Posted at 9-9 23:06
oops, I'm stupid, after setting port and setting ARM mode, I can unlock motor with remote controller.

I think because of connecting Betaflight, the goggles show low-power mode.

Glad you solved it.
Maybe put "Solved" into the headline...

skyjerry149 Posted at 9-9 23:06
oops, I'm stupid, after setting port and setting ARM mode, I can unlock motor with remote controller.

I think because of connecting Betaflight, the goggles show low-power mode.

Hi, skyjerry149. Thank you for the update. We're glad that you have figured it out and it is now working fine. Should you need further assistance, please let us know. Have a safe flight always!

Hey there,

It sounds like you've done some great troubleshooting already. The "no valid receiver signal is detected" error in Betaflight could be related to your receiver or the wiring.

Since you've replaced the motor, FC, ESC, and capacitor, it's unlikely those are causing the issue. It's good to know that your DJI remote controller is connected to the air unit and your camera is fine.

Regarding the quad icon in the bottom-left corner of your DJI FPV goggles, it typically represents your quad's battery status. If it's undulating, it might indicate fluctuations in battery voltage. Make sure your battery is fully charged, and the connections are secure.

The "lower battery" message in the bottom-right corner could be related to the battery voltage as well. Double-check your battery's health and connections.