I have a Sunpak PF30x on a Nikon D40. I just put in new batteries and the flash worked great for two shots. After that, the flash doesn't pop. I tried turning the camera off and the flash off then turning them both on again. The "test/charge" light is lit up but no pop. Is it really chewing through batteries that fast?
Update I've notice if the camera sits overnight,I can get two pops out of the flash,then nothing.