Press and hold the (or the power button on the remote) while turning the TV on until the "Software Updating" message appears.

* COMMERCIAL. * Firmware Download. SUPPORT. Firmware Download. * Company. Hisense-USA

If the official site does not list your specific model, you may need to:

: If your firmware is corrupted and software recovery fails, the main board is commonly available from retailers like eBay. Installation via USB

Finding specific firmware "backups" for older Hisense models like the LHD32D33TUK

: You can often find firmware by entering your TV's serial number on the Hisense Firmware Download page.

Once you obtain the correct file (often named upgrade_loader.pkg or similar): Format a USB drive to .