My SB-800 speedlight will not turn on even with new batteries. The terminals are clean. It will fire up with the quick recyling pack attached, but not without it.

SOURCE: Nikon Speedlight SB-800

I had the same problem. You locked your flash by mistake if you have a lock symbol on your LCD. Press the ON/OFF & Sel buttons simultaneously & the lock symbol will disappear. Then reset your unit by pressing Mode & ON/OFF simultaneously for 3 second & you are good to go!

SOURCE: ready light on my SB-800 speedlight

what about brand new, fully charged, 2700 mahas? why wouldn't a sb-800 turn on the ready light in this situation? i'm having this problem...

SOURCE: nikon sb800 speedlight

The trigger circuit and flash tube needs to be replaced . If you want me to repair this contact .

Berrie Smith Camera Repair
[email protected]
770-312-0719

SOURCE: using a speedlight

the SB-22 has a voltage of around 4.5v this means that it will not fry you D60 SLR so the answer is YES you can use you old flash gun with your D60

SOURCE: Nikon Speedlight SB-600 keeps firing

I believe that there is a safety feature built in that if the voltage in the capacitor gets too large the flash will fire, to prevent damage, could be this that is faulty, if it is a new main circuit board is required.