Use a high-quality USB 2.0 flash drive (8GB or 16GB is ideal). It must be formatted to FAT32 . Step-by-Step USB Firmware Update Guide
Press and hold the button on the TV's physical keypad (not the remote). tpsk506spb802 firmware usb link
Before downloading any files, verify your hardware version matches these standard board specs: 4-core CPU. Operating System: Typically Android 9.0. Memory: 1GB RAM / 8GB ROM. Connectivity: Integrated Wi-Fi. Preparation: Finding the Right Firmware Use a high-quality USB 2
A progress bar should appear on the screen. Do not turn off the power during this process. The TV will typically reboot automatically once the installation is 100% complete. Troubleshooting Common Issues tpsk506spb802 firmware usb link