Installing the wrong firmware version (e.g., using 1080p software for a 4K screen) can "brick" the device, making it unusable. Ensure the motherboard number TP.SK708D.PC821 exactly matches your hardware before proceeding.
You must download all parts (e.g., part01 through part10) before you can extract the firmware. Opening part02.rar alone will result in an error; the extraction software (like WinRAR or 7-Zip) needs the complete set to recreate the original .img or .bin file. Software Installation Process Download SK708D PC821 3840X2160 REF52 part02 rar
The file you mentioned, part02.rar , is a . Installing the wrong firmware version (e
Extract the files to find the main firmware image, often named allupgrade_aml972_8G_1G_sos.img . Installing the wrong firmware version (e.g.
Technicians use this firmware to resolve "hanging" issues (where the TV is stuck on the logo) or to repair corrupted system files.