I have two problems with my Nikon D5300 recently that are driving me crazy.
The first problem is when I take pictures, focusing on the same object, I keep getting different images: one is too bright, and when I take a picture again is too dark, and when I take picture again is good.
I'm in Manual mode using the same settings for all the pictures. For example the shutter speed is 1/6 sec, aperture is f/5.6 and the ISO is 200 in a room with good light.
The second problem is the flash does not go off all the time, using manual mode or Auto mode with the same settings as above. I uploaded the pictures so you can have a look.
I'm using built in flash, and the flash mode is Fill Flash