(a model from the Algerian manufacturer IRIS) usually requires accessing specialized TV repair forums or the official IRIS customer portal, as these files are rarely hosted on public global mirrors.
Using a tool like WinRAR or 7-Zip, right-click on the first part and select "Extract Here." The software will automatically pull data from Part 2 and any subsequent parts to create the single final firmware file (usually an .bin or .img file). Download IRIS SAT 42E790S Firmware USB part2 rar
Many IRIS models require holding the Power button on the TV itself (not the remote) while plugging the power cord back in. (a model from the Algerian manufacturer IRIS) usually
Format a USB drive to FAT32 and copy the extracted file to the root directory (do not put it in a folder). General Installation Steps Power Off: Turn off the TV and unplug the power cord. Insert USB: Plug the flash drive into the TV's USB port. Format a USB drive to FAT32 and copy
Do you have the (e.g., TP.MS338...) or the Part 1 file already?
For guaranteed safety, check the official IRIS website or contact their customer service via Facebook to request the exact firmware for your model.