Plug the TV back in. On many models using this board, you must on the TV (not the remote) until the indicator light starts blinking rapidly.
: Multi-part archives (like part3.rar ) cannot be opened alone. You must download all associated parts (Part 1, Part 2, etc.) into the same folder on your computer before extraction. Download P75 338 1366x768 QUALITA part3 rar
Copy the extracted firmware file (e.g., allupgrade_338_2G_8G.bin ) directly to the root of the USB drive. Do not put it in a folder. : Turn off the TV and unplug the power cord. Insert the USB drive into the TV's USB port. Plug the TV back in