Red Exclamatory Mark in yellow triangle then black out

[Android Central Question]

Hi

I was reseting the Samsung galaxy tab A7, suddenly black screen and the exclamatory mark with yellow triangle in middle of phone. Now nothing woking, long press with volume down. No any sign.
Please help

 

[belodion]

Why were you resetting?
https://forums.androidcentral.com/showthread.php?t=409154

 

[mustang7757]

Can you post a screenshot?
Does the device recognize if you charge it ?

https://forums.androidcentral.com/showthread.php?t=413366

 

[B. Diddy]

Welcome to Android Central! That sure sounds ominous.:-\

Let it charge uninterrupted on a wall outlet for at least 6 hours, then press and hold Power for about 30 seconds. If nothing happens, then something failed in the hardware -- could be the battery or the motherboard. Either way, you'd have to bring it to a repair shop.