It's urgent to connect the flash lamp outside the work room without flashing.

It seems that there are two ways to flash, one is through internal flash, and the other is through radio signal flash. Since there is no problem with lightning flash, lightning flash is not appropriate.

See if the channels at both ends of the transceiver are consistent? No, it's damaged. It needs repairing.

There is also the need to plug in the remote control on the hot boots, otherwise the contact will be poor.