Does not turn on

Same problem here kinda. My Clip Sport had this problem where sometimes it wouldn’t turn on, so I tried to “downgrade” the firmware by putting the old firmware file on the memory, and it got stuck into a bootloop. I would’ve returned it if I still had a warranty but downgrading was the only solution I could think about. Now my MP3 player is useless, it looks like an oversight in the firmware upgrade process.