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:
Place the upgrade_loader.pkg (or similar) file into the root directory of the USB. The specific file you mentioned, "part2
Go to the Hisense Firmware Download portal and enter your TV's Serial Number to get the correct version for your specific panel. The specific file you mentioned
For further assistance, you can also check community resources like the Hisense Reddit archive for alternative firmware versions. The specific file you mentioned, "part2
To download the firmware for the (Mainboard MS6586T 751