Hp Omen 15 T not turning on

Hello,
I have an Hp Omen 15t and the warranty got expired a month ago.
From yesterday its not turning on.
When i press the power button nothing happens and when connect the charger, the charging light goes off after 3-4 second then comes on. It happens untill the AC adapter is connected.
In the morning i tried again to turn it on and eventually it did!
After half and hour, I was playing games and all of a sudden it turns off and the thing happens again.
Please help.
I tried that Hard Reset thing. Didn't work
I tried the bios update with win+B+powerbutton. Didn't work.