Circuit diagrams for the Compal LA-4391P motherboard, revision R1.0, compressed into a 618 KB RAR file. The LA-prefixed numbering belongs to Compal, the contract manufacturer behind notebooks sold under several brand names, so the laptop brand is not shown here. Inside you can expect a PDF schematic for tracing standby and main voltages, checking the EC and power sequencing, and finding which rail a shorted capacitor sits on. Before measuring against it, compare the board code and revision printed on your PCB with the one stated here.
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 @abgm_manutencao_bios. Enginerys does not host this file.
All sources (5)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @abgm_manutencao_bios | 10 Jul 2019 | Open file on RM Schematics |
| @abgm_manutencao_esquemas | 14 Jul 2019 | Open file on RM Schematics |
| @IT_SERVICE_WORLD | 1 Oct 2019 | Open file on RM Schematics |
| @Satale_bios_esquemas_Laptop | 24 Feb 2021 | Open file on RM Schematics |
| @IT_SERVICE_WORLD | 2 May 2021 | 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.