Look for a white sticker on the back of the TV chassis.
Provides a method to revive a TV that is stuck on the Hisense logo screen and cannot access the main settings menu. hisense firmware update usb link
Resolves issues with app crashes, screen flickering, or HDMI issues [Source 1]. Look for a white sticker on the back of the TV chassis
If your TV is working fine and connecting to Wi-Fi, do not use a USB update. Stick to the automatic Settings > System Update path. Only use the USB link when your TV is bricked, stuck, or offline. hisense firmware update usb link
Use this method if the TV cannot connect to the internet or if you need a specific version rollback (if supported).