I am using both a sb 800 and 900 on a d200. The 900 after shooting about 75 images sounded an alarm which I believe is to alert over heating. I was using new alkaline batteries at this time. I shut it down and restarted it and all seemed fine until this weekend on another job when half way through a wedding it started to intermittently blow out images. I tried using it at all camera settings, changed flashes to the 800 and I continued to have this problem. I can not figure out what is happening. Any help would be appreciated
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The problem is probably caused by a fault in the main power circuit board, if the red light doesn't come on then you also probably won't hear the high pitched noise as the capacitor charges. Will be expensive to repair as you will need a new circuit board.
I have 2 SB-800s. When batteries leaked in one Nikon took forever to fix it, so they eventually sent me a refurb. Then they sent my original back. Which was great, until recently it developed this problem.
Another possibly related side effect is the modeling flash does not burst -- it only fires a single (very bright) flash.
The capacitor argument sounds likely. Coincidentally I also had a problem where the flash would fire sporadically -- but that was due to scuz buildup on the contacts.
The Sb800 and the Sb900 is compatible . Can you tell me more of what the problem is .
There is no frim ware for the flash . The NIKON SB 900 FLASH SHOE IS THICKER AND MAKES BETTER CONTACT . THE NIKON SB800 SHOE IS LOOSER AND NEEDS TO BE ADJUSTED
it could be possible that the light sensor (the device under the red transparent plastic) in front of the flash is already failing. to test,set the camera mode to auto then cover the sensor with your hand and do some test shots, the images should be overexposed if the sensor is covered, then shoot some photos without covering the sensor, the images should be properly exposed , otherwise it might already be a light sensor failure .