Plug the TV back into power. Some models will start the update automatically, indicated by a blinking standby LED.

Use a USB flash drive (8GB or smaller is recommended) and format it to FAT32 .

To download and install the firmware for a Nordmende P50-3663STV6.0

Download the .zip or .rar archive and extract it. Look for a file named allupgrade_3663_sos.bin or similar. Place only the .bin file in the root directory of your USB drive. Update Process: Turn off the TV and unplug it from the power outlet. Insert the USB drive into the TV's USB port.

You can find relevant technical files on specialist repositories such as KenotronTV or official Nordmende Support Directories . Installation Procedure

Do not turn off the power until the process is 100% complete. Once finished, the TV will usually reboot or return to a standby state. Factory/Service Menu