Samsung Edge S7 dead screen with blue constant light at the upper left corner

[Android Central Question]

My device did`t start, I tried all key combinations, no luck. The screen blinks with several lights when I try these combinations and dead again. Any help would be appreciated.

 

[B. Diddy]

Welcome to Android Central! That's usually a bad sign. It might just mean the battery is dead, or a power connection is bad. But it could also mean failure of the motherboard, or some other essential component. If the phone is still under warranty, contact Samsung; otherwise, bring it to a repair shop.