New answers tagged troubleshooting
Try turning on airplane mode. That is what many users recommend via reviews in the App Store.
Couple of things to keep in mind. The YN-560III has a built in RF-603 receiver, so you don't need to put one on the foot to act as a receiver. If you do use a non-YN-560-III/IV flash, then the on-camera unit must be in TX mode, the on-flash one must be in TRX (defaults to receiver mode, but auto-senses whether it's an on-camera transmitter unit or not--on ...
The Yongnuo YN-560iii has a built in 2.4G Radio Wireless Receiving module and therefore, you do not require to attach a transceiver to the bottom of the flash. Toggle through the Trigger Mode Button on the Flash, that will be the 3rd button from the left. Go past the S1, S2 optical slave modes until you get to RX and the wireless symbol is displayed. ...
Try removing and replacing the batteries to reset the transmitter. Make sure the switch is in the off position when you reinsert the batteries. The transmitter should remain off. Then turn the transmitter on and see if the transmitter still stays on when turned back off. If it does then it sounds like the on/off switch is faulty. If you can you may want to ...
Error 20 is a mechanical malfunction with the shutter or mirror assembly. Your camera will need to be serviced.
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