: Ensure you have the install.img file extracted from your downloaded archive (HK-T.RT2957E01_1366x768_MAN...). USB Drive : Use a USB stick formatted to FAT32 .
To update or reinstall the firmware for an mainboard (often used in brands like Grandin or various smart LED TVs), follow these steps based on the official HK-T.RT2957 Software Upgrade Instructions : 1. Preparation
: If the TV doesn't start the update automatically, try holding the physical Power or Menu button on the TV while plugging it in. File Integrity