Contact Hisense Support directly, as they can sometimes provide the exact firmware for your region's model. To help you further, could you let me know:
Keep holding the power button until the "Software Updating" screen appears. Download HISENSE 32N2170HW Firmware USB part2 rar
Sites like Receiver Pro may host the necessary files for this specific TP.MS6486T board, often split into RAR parts. 2. Prepare the USB Drive Download all parts: Download part1.rar and part2.rar . Contact Hisense Support directly, as they can sometimes
The process can take up to 15 minutes. The TV will restart automatically when finished. Key Troubleshooting Contact Hisense Support directly