Get a new remote Frsky Taranis X9D but when switch on it is always reboot. Try to switch off and switch on again, still get reboot condition.
Ask to Frsky about it and suggest to check the condition of diode D1 and D2 whether it solder properly or not.
Open remote casing and find that D2 is not solder properly. Re-solder again and X9D normally operated.
Due to the size of diode is very small, need magnify glass.