LG BH7520T Product Support :Manuals, Warranty & More | LG Jordan
The specific file size of is tied to a firmware loader for various LG home theater systems (such as the BH5000 , BH7000 , and BH9000 series). The File: A zip archive named H12IM2S.zip .
To use it, a user must copy the extracted .ROM file to a USB drive, connect it to the powered-on set, and press play to begin an automatic update process that restarts the machine. A Creative Spin: "The Artifact"
It contains the loader firmware (version H12IM2S0390) required to update the device via USB.