When the flash icon and question mark blinks at the same time, it's usually attributed to one of the following... 1. The lens focal length is less than 18mm 2. The D3300 thinks an external flash is enabled If you're not using a wide-angle lens and haven't used a speedlight recently, then you can reset your in-camera settings to default. You can do this by pressing the MENU button and navigating to the 'Shooting Menu' tab. Once there, you'll see 'Reset shooting options'. After you've done a reset, make sure your battery is fully charged and try taking a test shot in Auto mode with the flash enabled. Let me know if that works for you. For more details check Nikon D3300 Manual.

Download and Install LG Android Drivers On your PC Make sure have Unlocked bootloader of LG G4. Make sure you have installed TWRP In LG G4 Download the custom ROM file, Doc_Test.zip from the given link Now Connect your LG G4 to PC. Transfer the Rom zip file to your LG G4 internal/external memory Reboot into recovery mode. Flash custom ROM now. In TWRP recovery, tap on Install, and then browse to ROM file(Doc_Test.zip) and tap on it to select it for installation. On next screen, just do the ‘Swipe to Confirm Flash’ to install root on LG G4. You will get Successful written in blue text on next screen, tap on Reboot System. Wait for the device to boot up. Get more support from LG G4 Manual.

Factory reset your phone to fix this issue: (1) Ensure the device is powered off. (2) Press and hold the Power button and the Volume Down button (located on the right edge of the device) until the Sony screen appears then release. (3) From the System Recovery screen, select Factory Reset. (4) Select Yes. Hope this would fix your issue, if still issue exists then check Sony Xperia Z5 Manual. for more ideas.

This is important, because whether you’re able to meter or not, if there’s a problem of light leakage, your images are going to turn out pretty weird. So, as Lachman suggests, go into the shower, close the shower curtains, switch off the lights, and check for light leaks. How are you going to check for light leaks without light? Use a flashlight! In any case, if your camera is susceptible to light leaks, and checking does not reveal anything apparent, taping it would be a good idea. Hope this can help you . If still same exits then check Nikon D7100 Manual for help.