Compact boardview of 10.4 KB in .brd format named power-d, most likely covering a power or power-button daughterboard; no device or brand is stated. It opens in OpenBoardView, FlexBV and similar programs and shows where parts sit and how nets connect. Use it to follow traces from connectors to switches and to locate test points on the small board. Confirm the physical outline and part numbers before relying on it, because the parent device is not identified.
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 @vinafix_bios. Enginerys does not host this file.
How to open a .brd file
The most common boardview extension. Several unrelated formats share it, which is why one viewer opens a .brd and another refuses it.