Motherboard schematic labelled LA48 MB with board number 11264-1. The five-digit number with a dash suffix follows Wistron's numbering, so Wistron is the likely ODM, while the LA48 project name does not reveal the brand. Use this 3.17 MB PDF to trace voltage rails, follow signals to the EC and chipset, and find test points and components when diagnosing power faults or shorts. Compare the number and revision silkscreened on the PCB with the schematic before relying on part values.
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 @afsschematicfree. Enginerys does not host this file.
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