This is the stock firmware for the Cobia 55-inch Smart UHD TV. It is typically used for fixing software hangs, boot loops (stuck on logo), or resolving issues with the internal apps.
Searching for specific firmware files like for the Cobia CLEDTV5517UHD usually leads to specialized technician forums or hardware databases.
The LED indicator should start flashing, indicating the update has started. during this process.