I have a Nikon D300 and use a SB-800 on it. The camera is two years old and the speed light about four years old. Recently the speed light has been firing and not firing off and on. It is when the flash is on the camera. The test button fires the flash rapidly and consistently. I am thinking that there is a problem with the contacts. Has anyone had this problem or have any suggestions? Thank you.
#1. "RE: SB-800 not firing" In response to Reply # 0
I think the first thing I'd do is try with a different/new flash. If you have a camera store nearby that sells Nikon speedlights, you might want to give them a visit and see if they'll let you stick one of their units on your camera.
Outside of this, I believe I'd test this thoroughly to better determine when it is firing and when it is not firing:
Setup the flash on camera w/ Metering mode = M and flash in M mode. Test that the flash fires all the time in this mode.
Setup the flash on camera w/ metering mode = M and flash in TTL mode. Keep the flash pointed at the same scene so that it meters the same way in every shot (using a gray card or a consistently-illuminated surface as your "scene" is a good idea). Test that the flash fires all the time in this mode.
#2. "RE: SB-800 not firing" In response to Reply # 0 Thu 11-Oct-12 07:31 PM by blw
The very first thing I'd check is whether or not the flash is properly mounted on the shoe. Not meaning to insult anyone's intelligence, but I discovered that I had this problem - I think it was on my D2x but it might have been the D2h. The problem turned out to be that one side of my hot shoe had been slightly bent (I guess while it was in the bag?) and wasn't allowing the flash to slide fully into the shoe all the time. The fix was a bit unsubtle but effective: I took the batteries out of the camera and bent the shoe back using a big screwdriver. Voila, fully functional flash.
After checking this, the next stuff is as Ben described above.
_____ Brian... a bicoastal Nikonian and Team Member
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