Sites like MediaFire or Popi Electronics are common sources for recovery and upgrade software . 3. Installation Steps (USB Upgrade)
Wait, maybe the "tpsk518dpb802" is part of a legitimate software's activation key or license code. But even then, I can't confirm if that's the case without more context. It's safer to assume it's a fake. They should contact the software provider directly instead of using third-party sites. tpsk518dpb802 software free download install
Because this is a hardware microcontroller, Sites like MediaFire or Popi Electronics are common
Wait for the LED indicator to start blinking rapidly (red/green). The TV will show an "Upgrading" bar. Do not turn off the power during this time, or you may "brick" the board. or you may "brick" the board.