If the website does not list your model, contact Hisense Support directly. They can provide a direct download link or mail a USB drive with the correct firmware. How to Install via USB
Go to the Hisense Firmware Download portal and enter your TV's Serial Number to get the correct version for your specific panel. If the website does not list your model,
The specific file you mentioned, "part2.rar," indicates a multi-part archive often found on unofficial firmware repositories. To ensure the safety and compatibility of your TV, it is strongly recommended to use official sources: If the website does not list your model,
Turn the TV on while pressing and holding the Standby/Power button on the remote or TV until the "Software Updating" message appears. If the website does not list your model,
To download the firmware for the (Mainboard MS6586T 751