New Help me please, important :(

[Kroutonibar]

Hi!
I have a problem with my redmi note 6 pro:
there is a "fastboot" icon on the screen, and i cant turn on my phone...
i tried to connect it to my computer and go to MiPCsuite, but here comes another problem: my phone doesn't recognize the charger; the led doesn't turns on and my computer doesn't detect it...
so i don't know what to do, i need your help please

 

[Kroutonibar]

ok soo i pushed up the volume button with a knife, and now everything works i guess... but if i can have informations just in case if i have this problem again an also for other people, please if u can help me, do it