some months ago I bought a couple of new flash Subtronic 270 pro with external batteries in the flash arm. I am using them in manual mode by connecting them with optical fibers to a mirrorless camera Olympus OM-E1 mark 1. In order to synchronize the flash with camera I used the setup procedure indicated by the Company and It worked by adopting the configuration with “1 preflash”. Since two days, one of the flash does not work properly in the sense that when I select the full power or 1/2 power to the flash it fires but there is no possibility to synchronize the flash with the camera.
I made all possible tests: redoing the setup, trying with no preflash or 2 preflash configuration but it does NOT work (no synchronization is possible)
On the other hand when I select any power since 1/4 to 1/32 of the power it works! the synchronization is fine (in the 1 preflash configuration).
Have you any suggestion? any reset that I can try to apply? Did anyone encounter the same problem?
Thanks a lot for your feedback and attention