Bagaimana mengatasi layar black hitam tapi mesin masih hidup

permalasahan hp ulefone power armor 11 saya di nyalakan hp nya layar nya blank tetatpi suara mesin masih hidup. mohon cara mengatasi agar bisa hidup normal lagi hp nya gimana yah? mohon masukannya dong

How to solve the black screen but the machine is still on

The problem with my Ulefone Power Armor 11 cellphone is that I turn on the cellphone, the screen is blank but the engine sound is still on. Please, how do I solve it so that my cellphone can live normally again? please provide input