Recovery Official Full USB Firmware. Only for JVC LT-55CF890B Amazon Fire TV, not for Android version. Extract and copy the .bin files on the root of a USB formated FAT32. Press and keep Power button on TV then connect to mains. An Update message will appear sometimes for a short time then the screen will turn off but the update will still run. Once the update is complete the TV will restart. This might fix several issue like TV restartin in boot loop or RF Remote pairing. After this a factory reset is recommended. Unplug and reconect to mains and all should be OK.
If this solve your problem please don't forget to click "Thank You".
This TV came stuck on JVC Logo, was not reaching Wisdom Share at the time of making the backup, it turned out that the CPU was faulty hence causing the set to fail to reach Wisdom share. This backup was now written on another board and it worked very well.
Тв переодически запускался без звука. Процессор со следами сильного перегрева. Решил поменять майн, но ни одна из здешних прошивок к новому майну не подошла по матрасу, как будто битность не та. Слил с родного майна. Пила сказала - софт в порядке. С родной все заколосилось как надо.