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.
Once the progress bar reaches 100% or the LED stops flashing, the TV will reboot. Unplug the USB drive. Download Link
Press and hold the on the TV panel (not the remote). While holding the button, plug the power cord back in.
Use a 4GB or 8GB USB drive and format it to FAT32 .
Searching for specific firmware files like for the Cobia CLEDTV5517UHD usually leads to specialized technician forums or hardware databases.
Move the extracted file directly to the root directory of your USB drive (do not put it in a folder). Update Process: Turn off the TV and unplug the power cord. Insert the USB drive into the TV's USB port.
Download the .rar file and extract the contents. You should see a file typically named allupgrade_ms3458_sos.bin (or similar).