Turn off the TV, plug in the USB, and hold the power button while plugging it back in. The standby light should begin blinking rapidly to indicate the update has started.
Download all parts (Part 01 to Part 05) and extract them using WinRAR to get the single .bin file. Download CV338H A42 1366x768 ELEKTA USB part05 rar
Wait for the process to hit 100%. Do not turn off the power during the update! Turn off the TV, plug in the USB,