ZIP archive with the boardview for the ASUS TP300LA mainboard, revision 1.2. The layout shows component positions and net names, letting a technician hunt down a shorted rail, find test points for charging or power-on circuits and identify unmarked parts. Open the extracted file with a viewer such as OpenBoardView, FlexBV or Boardviewer. A revision 2.0 board also exists for this model, so read the revision on the PCB silkscreen and use the matching file, because placement and part references may differ.
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 @cynetitsolution. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.