I just received a YN-476 and I am noticing that when I use it on camera in both TTL and Manual mode it won't let me take a picture when I press the shutter. Its not that the shutter is going and the flash isn't: I press down the shutter and wait until it decided (seemingly randomly) to fire. Sometimes it takes a few seconds and sometimes I have to press the shutter again. This seems to happen regardless of whether I am in manual or TTL mode, and I don't think it's recharging because the LED is red. When this happens I can press the Pilot button and it still won't fire. I received the flash a few days ago so I can probably still return it. The control panel also had a lot of shallow scratches on it right out of the box (it look like it was caused by manufacturing, though, not someone using it). I can't reproduce this problem in manual focus mode, so maybe it has to do with focusing. The weird thing is that sometimes it won't fire even when AF is locked on.
Has anyone experienced this before? Am I just using the flash wrong? Thanks for any help!