Apple iMac A1419 logic board boardview for board 820-3298, revision A, in BRD format at 882 KB. Apple marks its logic boards with 820-xxxx numbers, and the suffix letter gives the revision, so the number on the PCB should read 820-3298-A before you trust net names. The layout helps locate components, test points and power rails while diagnosing no-power, shorted rail or no-video faults on this all-in-one. BRD files open in OpenBoardView, FlexBV or comparable viewers. Use it alongside the matching schematic for best results.
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 @boardviews. 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.