Help Needed- Boot Loop, Can't Enter Recovery Or Fastboot Mode

[Michalrp]

Hi guys
I need your help please.
My redmi 3 pro keeps restarting itself and I can't enter the recovery or the fastboot mode. Even when I press the power and volume button, I see the fastboot picture but after 2 seconds it restarts again. Disconnecting the battery didn't help.
Anyone has an idea??
Thanks in advance