Use a small USB stick (2GB–8GB is ideal) formatted to .
Wait for the TV to detect the firmware. A progress bar or light on the USB drive should indicate the update has started. : Download CV638H B50 3840x2160 OBOIN Shanghai part1 rar
Open the RAR/ZIP file and extract all contents directly to the of the USB drive. Do not place them inside a folder. Initiate the Update : Turn off the TV and unplug the power cord. Insert the USB drive into the TV's USB port. Use a small USB stick (2GB–8GB is ideal) formatted to
: Typically runs on Android (e.g., Android 4.4.4 version observed in some builds). : Open the RAR/ZIP file and extract all
: High-density 6-layer PCB with industrial-grade thermal management. Firmware Installation Guide (USB Method)
The is a specialized 4K three-in-one smart TV motherboard commonly used in 43 to 55-inch LED TVs, including brands like Sanyo and Thomson. This board is designed for 3840x2160 resolution displays and integrates the display driver, network interface, and control logic into a single unit. CV638H-B50 Board Specifications Resolution Support : Ultra HD 4K (3840x2160).