How to diagnose flight controller issues by checking the status LED when unable to connect to the Betaflight configurator?

Please observe the status of the blue and red indicator lights on the flight controller

1. Red indicator light：

(1) If the indicator light remains steady, it indicates that the flight controller has a normal power supply.

(2) If the red indicator light is not illuminated, it indicates that the flight controller does not supply power properly.

Please refer to the following article to troubleshoot the cause of the issue：

"Flight control cannot light up" troubleshooting method

2. Blue indicator light

（1）If the blue indicator light is blinking, it indicates that the flight controller is operating normally. Please try replacing the data cable and check if the flight controller has the correct drivers installed.

 Please refer to the following article for instructions on installing the driver software：

 Can't find the serial port? Can't connect to Betaflight (wrong driver installed)?

（2）If the blue indicator light is not lit at all or remains continuously on, it indicates that the flight controller is not functioning properly. It may be in a bricked state. Please refer to the following article to enter DFU mode and reflash the firmware program.

How to flash firmware for a bricked flight controller?