The "demo" firmware is the stock software that comes pre-installed on the unit, often tailored for retail displays or basic functionality.
If your head unit is completely bricked, stuck on the boot logo, or refuses to read the USB drive, you must use a computer and the to force the update. How to Force Flash via PC alps 8227l demo firmware update free
Download the firmware zip file and extract the files ( .bin , .img files, often including a preloader ). The "demo" firmware is the stock software that
Copy the extracted installation files (typically including a metazone.bin , boot.img , or a single uncompressed update package) directly to the root directory of your USB drive. stuck on the boot logo