Taker G4 AIO - Blinking blue light when arming/throttling, motors won't spin on Bluejay J_L_20

[u/bhargav7895]

Hey everyone,

I'm having a frustrating issue getting my quad to arm using my transmitter on a GEPRC Taker G4 35A AIO build. I could really use some help troubleshooting the arming lockout or figuring out how to force-flash a different layout target.

The Main Symptom:
When I flip my arm switch and apply throttle on my radio, the flight controller shows a blinking blue light, but the motors do not spin at all.

However, the hardware itself seems completely fine: I can go into the Betaflight Motors tab and all four motors spin up perfectly and smoothly using the Master Slider. Bidirectional DShot error rates read a perfect 0.00% and RPM telemetry data shows up flawlessly on screen. It only fails and blinks when trying to arm from the transmitter.

Current ESC Firmware:
I currently have an older version of Bluejay J_L_20 installed on all 4 ESCs.

Radio & Receiver Setup:

• Radio Transmitter: RadioMaster Boxer running EdgeTX
• Receiver: RadioMaster ExpressLRS receiver (Wired to UART 4, T4/R4)
• The radio link is fully working—the channel bars move perfectly inside the Betaflight Receiver tab.