The player was connected to PC and synching songs when a short power outage occurred (computer turned off, but power came back immediately). Since then performs a System Checking before boot screens, but instead of completing the process and showing Menu screen, it just turns off.
The player is not recognized by Windows (no icon on the Taskbar/ no USB event sound/ no folder opening), but "feels" power sources: display lights up if connected either to PC and power bank, obviously not charging battery but only doing System Check and "booting" and turning off (endlessly). In the second boot screen (when R0 appears), there's a message saying "updating the library".
I uploaded a video on Youtube better depicting this problem (but I don't know if I can link it in here!).
What's wrong with it? I hope someone will help me!