ZIP archive of 957 KB named DV1000-CT6. DV1000 matches an HP Pavilion notebook series, while CT6 reads as a board or project code, though the name does not say so outright. The content type is not stated, so unpack it and check for schematic or boardview files. Such material helps trace power rails, locate components and diagnose no-power or no-display faults. Compare the markings on the motherboard with the documentation to make sure the file actually matches your board.
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 @cyberlanelectonik. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Built-in OS tools7-Zip