If you are looking for the hardware-level factory menu, try these sequences while the TV is on:
If "proper content" means technical calibration or deep system info: Jellyfin on Hisense Vidaa - the code ninja hisensedebug
If you have more details about your device model, the specific feature you're interested in, or the context in which you're encountering "hisensedebug," I could offer a more targeted response. If you are looking for the hardware-level factory
: A link to a PNG file to serve as the app’s tile on your home screen. Alternative: Sideloading via USB the specific feature you're interested in
: Hisense customer support or the official website might have information on specific features and how to use them.