If the TV is stuck on the standby light (Red Light) or the logo, the software may be corrupted.
You usually only need to touch the firmware in three specific scenarios: T.vst29.03 Firmware Upgrade
A go-to replacement for dead original TV mainboards. If the TV is stuck on the standby
Use a 4GB or 8GB drive formatted to FAT32 . Larger or high-speed USB 3.0 drives often fail to be recognized by the board. T.vst29.03 Firmware Upgrade