Zip archive of 5.62 MB whose name, la22c350d1, looks like a TV or monitor model code, though the name itself does not say what the archive holds. Its contents could be a service manual, schematic or firmware set, so open it and confirm the model and main board label before relying on anything inside. Service material of this kind is used to trace power supply rails, backlight drive and signal paths. Compare the board number printed on the PCB with the documents, and keep any original firmware backed up before flashing.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @datasheets1. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.