Use a FAT32-formatted USB drive (8GB or 16GB recommended). Extract: Download and extract all parts of the rar file.
If your Smart LED TV is stuck on the logo, restart-looping, or showing the "Android process has stopped" error, a firmware refresh is likely needed. This tested software specifically supports the mainboard with a Full HD (1920x1080) panel resolution. Mainboard Specifications Model: CV338H-A50 (Smart Android 3-in-1 Board) Resolution: 1920 x 1080 (Full HD) Operating System: Android Memory: Typically 512MB/1GB RAM
You can often change the resolution or boot logo via the Service Menu by pressing Input + 2580 on your remote.