PDF schematic for the HP Compaq CQ40 Intel variant, built on the Compal LA-4101P board. LA-series numbers are Compal designs supplied to brands such as HP. The circuit diagram covers power supply stages, charging, chipset rails, and connector pinouts, which makes it the main reference when measuring voltages or tracing a missing signal. Open it in any PDF viewer, and use it together with the boardview for the same board to find each part physically. Confirm the board revision on the PCB matches the document.
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 (3)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @schematicslaptop | 8 May 2023 | Open file on RM Schematics |
| @cyberlanelectonik | 16 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.