Copy the file to the root directory of the drive (do not put it in a folder). With the TV off, insert the USB into the port.

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

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

: Email Hisense support for your specific region with your model and serial number to request the upgrade_loader.pkg file. Hardware Replacement

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

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

Do you need the location on your TV to help find the correct download on the Hisense site ? Hisense Firmware Downloads & Updates | Support

(Board: , Panel: 1366x768 ) typically requires using specialized technician forums or official support channels, as these files are rarely hosted on public direct-download sites. Official Firmware Sources