PDF schematic for the T43 whose name carries the token ROME with 4.5, most likely a project code name and the revision of the drawing set. The file is 1.22 MB. With it you can trace power rails from the adapter input through the regulators, find enable and power-good signals, and identify components around a suspected short. Since T43 boards came in more than one version, compare the revision printed on the PCB with the title block before relying on it, then open it in any PDF viewer.
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 @alischematics. 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.