How to solve Check Board Voltage
1.For 3.4.6 version firmware
Do not select Board Voltage at Arm_check parameter,then remember to click the “Write Params”Button. Then reboot he board.
2.For 4.0 above version firmware
Set BRD_VBUS_MINI as 4 or lower, then remember to click the “Write Params”Button. Then reboot he board.