FAT32-formatted USB drive (4GB–16GB, no other files)
Canon does provide public direct download links for most iR-ADV firmware without authorization. You must obtain it through official channels: canon iradv 4245 firmware download install
A failed firmware update can render your device inoperable. Read these precautions carefully: FAT32-formatted USB drive (4GB–16GB, no other files) Canon
Do not panic. Perform a hard power reset : Unplug the power cord, wait 30 seconds, plug it back in, and turn on. If the screen remains blank, you will need to call Canon Support or your service provider. FAT32-formatted USB drive (4GB–16GB