I can tell yous I didn’t backup my device but I united nations-bricked the device with the image below, the only problem I faced is that my small infrared remote does non piece of work.
TWRP is the needed software to backup your device. Try the link below for this backup:
Then to flash your device you need a shield USB cable A-A connected to the almost left USB port of the device, the 1 near SD slot. And then using USB burning tool perform the beneath steps:
printing the toothstick and keep it pressed, with no power supply connect the USB cablevision but having the USB Burning Tool opened. Yous will run across continued. Then import the paradigm beneath and wink the device, you will take a nice surprise of working device with Lollipop v.1.1
https://mega.nz/#F!mtlkSYba!ynMZU6b6iPPdOjlmhzYBTw
Best regards,