Schematic in PDF form for the Wistron LA57 mainboard, number 10254-2, packaged in a 1.94 MB RAR. The name gives no laptop model, but this LA57 board number also appears on Lenovo V570 firmware in this index. The diagrams help trace power sequencing, the charger circuit, CPU core rails and signal lines when diagnosing a dead or shorted board. Extract the archive and open the PDF in any reader. Check that the board number printed on the PCB matches before relying on the 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 @schematicslaptop. Enginerys does not host this file.
All sources (4)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @schematicslaptop | 11 Apr 2023 | Open file on RM Schematics |
| @boardviewsandachematics | 2 Sept 2025 | Open file on RM Schematics |
| @cyberlanelectonik | 23 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 14 Aug 2026 | Open file on RM Schematics |
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.