Use a drive 4GB or smaller and format it to FAT32 .
(This ensures your remote control works correctly after the flash). Download SK506S PB802 1366x768 Akai REF70 part01 rar
Place the extracted .bin file directly in the root directory (not inside any folder). Flash the TV: Unplug the TV from power. Insert the USB drive. Use a drive 4GB or smaller and format it to FAT32
The standby light should start blinking rapidly, indicating the update is in progress. specifically the 1366x768 Akai REF70
If you're looking for the (often listed as TP.SK506S.PB802 ) firmware, specifically the 1366x768 Akai REF70