YN-560 Optical flash not working
I have been using a Yongnuo YN-560 manual flash with my D600 as an optical slave (S2). However, all of a sudden the remote trigger seems to have stopped working and I'm no longer able to use the flash remotely. The flash works fine on camera in manual mode and it's just the remote trigger that seems to have been broken. Also I noticed that the red lights on the flash(optical sensors) that used to glow earlier no longer glows - those stay dark and so am guessing the sensors have gone bad.. It has only been 1.5 years since I purchased the flash and have barely used it and so was wondering if any others had a similar experience. If so, I'd appreciate any thoughts on how you may have solved it.