It's stuck at this screen
https://imgur.com/nPiRA2y
I would delete ebooks but I can't access it via PC.
It had custom screensaver so I think someone probably jailbroken it, but I'm not 100% sure.
Right now, when I run imx_usb commands it reboots but can't go to fastboot mode. It seems like it's in USB download mode, if I'm correct.