If your download is split into parts (like "part5.rar"), you must download all parts (Part 1 through Part 5) and use a tool like WinRAR or 7-Zip to extract them together. You cannot extract or use Part 5 individually.
Ensure the TV or controller board is disconnected from power. Insert the USB drive into the board's USB port. Download VST59 Software part5 rar
Connect the power. A status LED on the board should start , indicating the update is in progress. If your download is split into parts (like "part5