If the camera light does not flash when the built-in flash of the camera is not turned on, why?

Brother, it seems that you have less experience. There are several reasons for this problem:

1. Camera and wired sensor usually have poor interface contact.

2. If you use a flasher, it may be that the flasher inside is broken. That thing is thin and delicate. The original factory is better, and many of them are made outside by ourselves. Our photo studio basically uses one every three days.

The wireless flasher is an infinite flasher. Any brand of lamps has a manufacturer. See which manufacturer your lamp is from. Buy one, it's not universal. If the adapter you buy is not universal, there will be contact problems.

There are times when wireless flashers can't sense, such as the dark studio, and sense the distance.