Catalogued as a schematic, this 48.6 KB PDF is named 120lq045 and gives no laptop model, board number or revision. The code reads like a rectifier part number, and an identically sized 120lq100 file suggests both point to the same family document. It opens in any PDF viewer. The useful content for repair is typically the ratings table, forward-voltage curves and mechanical outline. Check the printed code on the component and ensure package and mounting match before ordering a replacement.
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 .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.