MSI MS-6539 files packed in a 2.76 MB zip archive. Revision, chipset and contents are not given in the name, so the archive needs to be opened to identify what it holds. MSI uses the MS-65xx range for older desktop mainboards and prints the code on the PCB. Schematics from such packages help trace rails and diagnose shorts, while BIOS images can be written with an external programmer. Confirm the board number and revision match, and save the original chip contents first.
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 @IT_SERVICE_WORLD. 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