Question about Nikon Speedlight SB-800 TTL Flash

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Nikon SB-800 Failure

Ready light acts like it is charging but never stays on to show ready charge.  Cannot get flash to fire either by camera or test button.  I have changed out a new set of batteries

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Re: Nikon SB-800 Failure

Check by testing flash that I've posted on 1/15/08

Posted on Jan 15, 2008

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SB600 will switch on but no ready light and won't flash (constantly showing standby mode). I have tried several different batteries to check they are charged etc ... ps I have 3 speedlights and this is...

It is strange that all three units have the same problem. I am assuming that when you tested your three units that you did so by attaching them to your camera. If all three are bad, it could be that the problem is in your camera. Let's disregard the ready light for the moment because the ready light could be bad or your flash is only partially charging. As an experiment, turn on one of your SB-600's and after allowing time for it to charge, short out the contact pins on the flash shoe. If it flashes, it could be the camera at fault.

The SB-600 is an older unit. If you have three of them, I will assume that you are using them professionally and they have had heavy consistent use. As a result, your speedlight's capacitors may have reached the end of their life span.

Let's look at what may be happening. By charging, it means that the batteries in your speedlight are supplying a low voltage to a capacitor bank that charge to a higher voltage that is sufficient to fire the flash tube. All capacitors deteriorate over time and use and will lose their ability to charge and maintain a charge. Given the age of your equipment, that may be the case. If you have the knowledge and equipment, I would replace the capacitors on one of your units and see if it works. If not, I would send one of the units into Nikon for a free repair estimate. They can be reached at 1-800-645-6687 9AM-8PM EST, Monday to Friday.

Sep 01, 2013 | Nikon Speedlight SB-600 TTL Flash

2 Answers

My SB600 is on, shows "ready" but won't fire... the STBY shows on even when not connected to the camera. Will not fire. Any ideas?

My SB600 is on, shows "ready" but won't fire... the STBY shows on even when not connected to the camera. Will not fire. Any ideas?

Aug 17, 2010 | Nikon Speedlight SB-600 TTL Flash

1 Answer

Batterys fully charged, ready light flases but no flash

Will the flash fire if you push the "flasn" button? If so, problem may be with the camera or contacts.

Mar 28, 2010 | Nikon Speedlight SB-600 TTL Flash

1 Answer

Sb800 is on mode lcd panel showing all ok buti pres flshfire flash not fire

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.

Jan 14, 2010 | Nikon Speedlight SB-800 TTL Flash

4 Answers

SB-600 display shows, but will not fire or test fire

there's a part in inside that triggers the light .. it might need to be fixed.
Please contact Nikon Tech Support to walk you through resetting the flash.
a. Have you tried that? it's in the Manual

Sep 07, 2009 | Nikon Speedlight SB-600 TTL Flash

2 Answers

Ready light on my SB-800 speedlight

put in a fresh set of batteries. The ready light won't turn on until the flash capacitor is fully charged. And if your battery is weak, it can take very long (minutes!) to fill the capacitor. You still can fire the flash even it is not ready, it will just dump whatever power it stored in the capacitor.

Jun 12, 2008 | Nikon Speedlight SB-800 TTL Flash

1 Answer

SB-600 Ready Light Won't Come On When Mounted on D-40X

Check that all the batteries are functioning properly, and that they have been inserted in the proper direction.

Jerry G

Dec 11, 2007 | Nikon Speedlight SB-600 TTL Flash

1 Answer

Nikon SB-800 Defect

Have you tried other batteries?

If one cell has died, there will be enough power to power up the flash, but not enough to charge it reasonably fast. It may also stop the other cells charging up properly if they are charged together. I've had this problem with poor quality rechargeables before. I think flashguns put pretty heavy demands on batteries.

Oct 23, 2007 | Nikon Speedlight SB-800 TTL Flash

1 Answer

Nikon SB-29s macro speedlight

Trigger coil or a flash tube. Flash tube is easier to replace so try to replace that first. Caution before you do anything else when you open the unit locate the main 330v capacitor and discharge it before you work on the unit !

Mar 22, 2007 | Nikon Speedlight SB-600 TTL Flash

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