Why does my flash not work properly?
My camera has been used moderately ever since I bought it in 2012. Currently, I've been having trouble with my camera's flash and it isn't working anymore.
There are a number of reasons why your flash might not be working.
First, make sure your flash settings are properly enabled when using the camera.
If that isn't the problem, make sure the flash connector is properly cleaned so that a good connection can be established. If there is too much dust collected, use a cotton swab to carefully clear it off.
Also make sure that your battery is charged; the flash will not fire if the battery is too low.
If none of these is the problem, your flash bulb may be burned out. Please refer to this page for help replacing it: How to replace your digital camera flash bulb
when I use YN560 in M mode, the bottom half picture is black. Thanks
That's simple. You are shooting with shutter speed faster than the x-sync speed (which is 1/180).
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