Firmware archive for the HP Compaq 420 laptop, which the name marks as tested and working, with a note about a fast display. That note probably means the image brings up the screen quickly, but the name does not explain it further. The RAR is 1.17 MB and likely holds the BIOS image for the SPI flash chip. Use a programmer to restore a board that stays dead or shows no picture because of a corrupted BIOS. Read and back up the original chip, and confirm the image size before writing.
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 @hrtechno. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.