Gigabyte B450 AORUS PRO desktop motherboard schematic, revision 1.0, in a 1.65 MB PDF. The B450 chipset board for AMD AM4 processors is covered here, so a repair technician can trace the VRM, standby power, BIOS SPI flash wiring, the Super I/O and the front-panel power-on path. Open it with any PDF reader and search by net name. Gigabyte often releases several PCB revisions of the same model, so confirm the revision printed near the PCIe slots matches 1.0 before relying on parts.
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 @ShareMan_Electronic_Files. 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.