"Downloading Do Not Turn OFF The Target!" Error In Samsung Galaxy S7

For those that own a Samsung Galaxy S7, you could be dealing with the “Downloading… Do not turn off the target!” This message will appear on your Galaxy S7 when you active the download mode instead of another mode on your smartphone.
If this is the first time you’ve seen the “Downloading … Do not turn off the target!” message, then it could be because you didn’t use a USB cable when connecting your Samsung Galaxy S7 to a computer to update the Android software.
This problem can either be solved by connecting your Galaxy S7 to a computer with a USB or you can just wait and turn off your Galaxy smartphone by pressing the power button.
 
Factory Reset Samsung Galaxy S7
If the method above didn’t help you fix the black screen problem on the Samsung Galaxy S7, then you should try to factory reset the smartphone. The following is a guide on how to factory reset the Samsung Galaxy S7. It’s important to note that before you go to factory reset a Galaxy S7, you should back up all files and information to prevent any data from being lost.