Strange problem after flashed k770i

Hi, I've recently flashed my k770i cid52 with r8be001 cid53. Everything went ok but i used customisation without my language. So i tried to flash my phone just with other customisation file (xs++). Everything went ok but after that i can't switch on my mobile. Its charging normally and i can flash it with setool2lite without any problems (it says that everything is ok) but i still can't switch it on. I've tried to flash it with previous firmware with cid52 but it didn't help. How can i fix it?

Best regards