my sony xperia t2 ultra dual suddenly freezed and is not starting

[PIYUSHK1993]

my sony xperia t2 ultra dual suddenly freezed and is not starting again,it was nearly 92% charged when this occured...... it gives a red light while charging and while long pressing the on-button...but without any display...what can I do?

[Uliwooly]

@PIYUSHK1993

Connect the phone to a wall charger > press and hold power and volume up for 10 seconds > let it charge for 2-3 hours