My problem is solved when I read this message , Thanks."I just brought me new 600 ex speedlite home and had the same problem reported here. I tried holding the two clear buttons down and turning the power switch to lock and presto it now appears to b...
I have a new 600 Ex-RT and battery does not work after first time (total less than 100 shoots). new battery with dead battery sign! any solution. I got it from B and H
