try one with the up button and then with the down button it could work also you can see this video it may help you https://youtu.be/YJbYYvj-M7kif the solution is solve your problem then you can accept it by cleck the three dot then accept solution

you can use a headphone

I will give you some advice maybe it could help you:1- connect the phone with a laptop or with a headphone then shut down the phone after that press the volume up or down button i really forget which one ahould work and the close button at the same ...