To help you further:
To fix a "hang on logo" issue or update your system, follow these steps: 1. Download the Correct Firmware kk.rv22.819 software download
Insert the USB drive into the of the motherboard. To help you further: To fix a "hang
Copy the software file (often named allupgrade_819_sos.bin or similar) to the —do not put it in a folder. 3. Installation Process (USB Upgrade) Turn off the power to the TV. kk.rv22.819 software download