: Use a tool like WinZip or 7-Zip. Right-click the first part and select "Extract Here" to combine them into the final .bin firmware file.
Do you have the of the TV this board is inside so I can help you find a more specific download link?
: Since you mentioned "part1.rar," ensure you download all numbered parts (part1, part2, etc.) into the same folder before extracting. The extraction will fail if a part is missing.
: Often shares download links for CV358H series boards on their Facebook page or dedicated website.
: Format a USB flash drive (8GB or less is recommended) to FAT32 . Copy the extracted .bin file to the root directory (not inside a folder).
: Power off the TV, insert the USB, and power it back on. Many boards will automatically begin the update, often indicated by a blinking standby light.
: A popular resource for technicians that hosts USB Firmware and BIOS Bin files for specific board models like the CV358H-T42
The firmware for the (1366x768 resolution) is typically available on specialized LED TV repair and software forums rather than official manufacturer sites, as this is a common "universal" or Chinese-manufactured mainboard used by various TV brands. Where to Find the Firmware