Unlike many boards, the TP.ATM30.PB801 often cannot be updated via a simple USB stick in the TV's port. You will generally need: Amlogic USB Burning Tool
The is a common Amlogic-based Android motherboard used in various smart LED TVs. Updating the software on this board is typically done using the Amlogic USB Burning Tool to flash new firmware or recover a "dead" board. Core Update Process tpatm30pb801 software upd