Sb800 firing flashes continuously for no reason. I feel like there maybe a short or something. For no reason it has started to fire flashes, even when I am not pressing the shutter speed or will just be holding the camera. I always have my Sb800 on the camera and have had it 2 years. I have a D200 camera, is there a setting in the camera I may have done wrong? thank you.

What strobe are you using besides the SB800? Probably the best solution is to use a hotshoe extender for the mystery strobe (like an SC-15), and then set the SB800 in SU-4 mode (i.e. fire when any other strobe around it fires).
Sounds like the mystery strobe isn't triggering correctly with the sync signal that the body is giving through your adapter.

You did not say what type of body Nikon you have and if it is any of the D-60 to D-300 there is a hood and you push the built in flash in its storage configuration. Good Luck

sounds like a short in one of the circuit boards, most likely one or seveal of the ribbons and boards will need to be replaced to correct the problem. Send in for repair expect to pay up to $200 for a Nikon factory overhaul

What's "flishfire"?

Try this:
Remove flash from camera.
Turn on flash
Wait until ready.
Short out center pin to outside contact, this should fire the flash.

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If the test button doesn't fire it, then you probably broke something.

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.

Sorry I don't have a real solution for you.

The channel on the flash for remote on the 4a withthe NIKON D70
If you are using the Nikon D200 then the channel is 1a ...

If you have any more questions contact

Berrie Smith Camera Repair
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The sb600 needs to be able to see the preflashes of the sb800, so this is probably caused by one of two things.  The first thing I'd check is whether or not the light sensor on the side of the sb600 was covered, blocked, or facing away from the sb800.  I've had problems outdoors when I forgot to have the light sensor face the camera.
If the sensor was facing the camera, it is possible that the flashes didn't have a good line of sight to each other.  That normally shouldn't matter, but if there is a high ceiling and lots of people, it could be the case.  I don't know if it will help, but in any case I would recommend using a StoFen Omnibounce on the sb800 to increase the likelihood that the light finds a direction where a surface to bounce off of is found.  
Good luck.

When you attach the flas to the camera can exidentli fire. This is normal, and manufacturer recomendation, turn off the flas unit before attach or deattach, prevent this fireing. Fireing when you turn the flashead is not normal. Probably the mounting foot of the flash unit can move in the hotshoe, breaking connections between the connector pins, causing exidental fiering. Always lock the locking lever of the flas, wich can prevent this unwanted movement. Also chek the hotshoe on the camera, wich should to have a "leaf spring" keeping the flash unit steady.

I had that same problem with the SB600 and the SB 800. Solutions; get a new one. After about a year of usage the sb600 started giving me that problem. It flashes but it does not sync. It still works as a remote unit, but not mounted on the camera. The SB800 just went to a coma last weekend. No sync at all, not even as remote unit, no strobe function, just a bright flash, when triggering the test button with new fresh batteries, it flashes at max power once and takes around 7 seconds to recycle. No multiple flashes at all. I had to buy a new one.