I can give you more specific instructions based on your situation. How to Upgrade VSP Devices via USB Drive - Extreme Portal
: Try a different USB drive or ensure it is formatted to FAT32 .
: This is a common "service menu" issue after flashing. You can usually fix this by entering the service code (often Menu + 1147 or Input + 2580 ) and adjusting the "Panel Settings" or "Mirror" option.
The file is a firmware update package for the VST 6A338.PB818 universal LED/LCD TV motherboard . This specific firmware is configured for a 1366x768 resolution and is often used when replacing a TV's mainboard or fixing software-related "brick" issues. Key Technical Specifications Motherboard Model : VST 6A338.PB818