Screen Glowing but no display. On off switch does not help.

I have purchased the Samsung Tab A6 (2016) SM P 585 few days back.

It was working fine. Now all on a sudden it got off after transferring a file over Bluetooth from my trusted computer.

Now the screen is glowing but no display. I thought Bluetooth transfer took lot of power away but charging is also not working.

Now the screen is glowing without any display.

Please help