Hi team,
I have my EC20 worked for the first time, but the second time I turn it on, the LED STATUS doesn’t work anymore.
Note that I have already measured the following properties:
Vbat=3.82V (I checked with oscilloscope and it show that the power supply is stable)
V(PWRKEY)=0.82V
V(RESET_N) =1.83V
I also set the boot_config to high level in order to boot up the board.
Did I have any problems that the LEDs couldn’t work? Any help is appreciated.
I suggest you can check the LED characteristic - voltage drop, forward current whether they meet your design. If the current is too small, the LED will not be lit.
Or you can replace the LED to try.