Do you charge the phone for around an hour. If no, try it and see how.
If yes, try to press volume up, home button, power at the same time. This works for my s7 edge that have the same issue with you. If nothing comes on, try to press volume up and power at the same time.
+
Also try to replace your battery, a dead battery may cause phone not to boot.
Still no response? Maybe your logic board maybe dead. If yes, return your device ASAP before the warranty is void.
Warranty void already? You should run out of luck, you can't fix it anymore. Because normal users can't do it
Do you charge the phone for around an hour. If no, try it and see how.
If yes, try to press volume up, home button, power at the same time. This works for my s7 edge that have the same issue with you. If nothing comes on, try to press volume up and power at the same time.
Still no response? Maybe your logic board maybe dead. If yes, return your device ASAP before the warranty is void.
Warranty void already? You should run out of luck, you can't fix it anymore. Because normal users can't do it