Redacted wrote Did you try to root it?

Anime wrote Press and hold the Power key.
As soon as you can see the 'Samsung Galaxy S7 EDGE' on the screen, release the Power key and immediately hold the Volume Down key.
Continue holding the Volume Down button until the device finishes rebooting.
You may release it when you can see 'Safe mode' in the bottom left corner of the screen.
While in this state and the device is still unresponsive and unable to boot up, then you can move on to the next step.

Step 2: Wipe the Cache Partition

Since the safe mode procedure didn't help in fixing the problem, it's time for you to move to the next method by deleting the system caches. Through this procedure, the files that the device had been using in the cache directory will be deleted so that your phone will create newer and fresher caches that are completely compatible with the new system. After doing so, try to see if your phone is able to boot up completely. If so, then the caches were outdated at that time and that's the reason that the firmware crash and cannot boot up. You can follow these steps to delete the system cache:

Turn off the phone.
Press and then hold the Home and Volume UP keys, then press and hold the Power key.
When the Samsung Galaxy S7 Edge shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
Using the Volume Down key, navigate through the options and highlight 'wipe cache partition.'
Once highlighted, you may press the Power key to select it.
Now highlight the option 'Yes' using the Volume Down key and press the Power button to select it.
Wait until your phone is finished wiping the cache partition. Once completed, highlight 'Reboot system now' and press the Power key.
The phone will now reboot longer than usual.
If, however, the issue is still happening, you can proceed to the next method for it may be a major firmware issue.

Step 3: Perform Master Reset

As far as troubleshooting is concern you all already performed all the necessary procedures to fix the issue. But since the problem still not fix, then you don't have a choice but to perform the last method by bringing it back your phone to the default settings. But remember, in resetting the device all files and data will be erased. So, before doing it make sure to create a backup by transferring all of it to your computer or SD card.

Then, disable anti-theft by following the steps below. This will make sure you won't get locked out of your device after the reset:

From any Home screen, tap the Apps icon.
Tap Settings.
Tap Cloud and accounts.
Tap Accounts.
Tap Google.
Tap your Google ID email address. If you have multiple accounts setup, you will need to repeat these steps for each account.
Tap Menu.
Tap Remove account.
Tap REMOVE ACCOUNT.
After this, feel free to reset your phone through the recovery mode...

Turn off your Samsung Galaxy S7 Edge.
Press and then hold the Home and Volume UP keys, then press and hold the Power key. NOTE: It doesn't matter how long you press and hold the Home and Volume Up keys, it won't affect the phone but by the time you press and hold the Power key, that's when the phone starts to respond.
When the Samsung Galaxy S7 Edge shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds. NOTE: The "Installing system update" message may show on the screen for several seconds before displaying the Android system recovery menu. This is just the first phase of the entire process.
Using the Volume Down key, navigate through the options and highlight 'wipe data / factory reset.'
Once highlighted, you may press the Power key to select it.
Now highlight the option 'Yes -- delete all user data' using the Volume Down key and press the Power button to select it.
Wait until your phone is finished doing the Master Reset. Once completed, highlight 'Reboot system now' and press the Power key.
The phone will now reboot longer than usual.

UKz_V3NOM wrote

Redacted wrote Did you try to root it?

yes