Question about Nikon Speedlight SB-800 TTL Flash

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Fried Unit At my stepdaughter?s wedding this past week end I shot over 600 images using my speed light but when I put in a fresh set of 5 batteries ?? a non-rechargeable got mixed in with the other 4 rechargeable ones and after a few shots I heard a snap, then saw a bit of smoke coming out of the unit so I immediately took the batteries out. The unit will now turn on but it won?t flash. Question, would this have cause it to blow like that and is the whole unit lost (fried) or is it worth trying to have it repaired? Thanks in advance for any help.

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Re: Fried Unit

Mixing the batteries should not have damaged the flash. More likely the smoke came from the odd battery.

Posted on Nov 28, 2007

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I am going through lithium 9x's batteries VERY fast with my SB-600. The flash is about 5 or 6 years old. When I try to change the batteries they're so hot you can barely touch them. When I do Weddings I...

Do not use the Gary's or white dome junk on the flash.
It will overheat the flash, warped the Fresnel Lens and make 4AA very hot.

You are bouncing your flash up in the ceiling /or sideways.

You are using reduction camera & zooming at wide angle with also high f stop.

Buy a real pro flashes like the following:
1. ATG Gold MG8k Flash Kim X3
2. ATG Gold Cyclops
3. ATG Gold Qflash
4. Metz 76MZ-5
5. Quantum Qflash

Even the claimed pro Nikon SB-910/900/800 are junks & overheat, shutdown when you pushed them.


Jul 02, 2014 | Nikon Speedlight SB-600 TTL Flash

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My SB-600 Just quit firing... :(

It maybe because it overheated he flash tube, nikon flash guns use a thermal cutout, to prevent overheating, usually after approximately 30 / 40 shots, in quick succession.  It should start working again after it cools down.
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D300, SB-800 fires but no exposure.

Thats is odd.
When you hook everything up, do you turn on the flash last?
It sounds like the battery pack is giving the flash a different voltage then it should have causing incorrect readings and exposures.
I would send the pack back to Quantum(located in Ronkonkoma, NY) and have them check it.

Jul 13, 2009 | Nikon Speedlight SB-800 TTL Flash

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Flash light is on but does not fire


Check dirty contacts.

Do this test:
Fresh 4 batteries
Turn on and wait until flashing Green Light.
With insulated wire, both ends stripped to 1/4" of bare wire, short one end to Center of flash shoe and the other to metal outside contact.
Make sure flash is not facing at eyes.
Shorting it should fire the flash.
Or connect the PC Cord to flash and short Center Pin to outside.

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Flash blows out the image!!!

hi ,

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 .

Sep 30, 2008 | Nikon Speedlight SB-800 TTL Flash

1 Answer

SB-600 will never be on ready

The capacitor may be weak, or there is a problem at the component level that is not allowing the inverter to reach full voltage.

The flash will need shop service.

Jerry G.

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My snaps are underexposed with 350D camera and 580EX TTL

Set camera:

Single shot mode not servo/C modes
Focus sensor set for center
Make sure exp. comp is not set on -(minus) side.
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Flash in need of crash cart?

That Nikon rep really knows his products.

1. Really, the batteries were very hot could have been not putting the one of those five batteries in the right direction.

2. You're using the flash with those dome filter or pull out filter from flash. Over 55% of light power are lost and maybe only 20% to subject. This will make the capacitor/batteries very hot and may break down, flash will take a break when you needed the most.

3. Firing the flash off using DC voltage very fast will kill the flash or making it work harder.

Hope they are helpful.

Oct 15, 2007 | Nikon Speedlight SB-800 TTL Flash

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