I cannot directly provide the image file or the full schematic diagram for the LAC781P as it is likely proprietary copyrighted material from Akustik & Raum (Acustica & Raum).
Schematic Sources: Technical documents for the Compal ABL51 LA-C781P are available on platforms like Laptop-Schematics and OlderGeeks. lac781p schematic top
Super IO Diagnosis: If 3.3V is present at the power button but the board doesn't react (no current draw change), the Super IO may not be sending the "S5_ON" or "RSMRST#" signals to wake the chipset. I cannot directly provide the image file or
When troubleshooting a "No Power" issue, technicians check these specific points on the LA-C781P: Power Rail Description Test Point / Component +19V (VIN) Main adapter voltage Check DC-in Mosfets and CLR (Current Limit Resistor). +3VLP / LDO Low drop-out always-on voltage Available at the RTC cell and battery connectors. +3VALW / +5VALW Always-on system power Generated by the RT8243 (PU2) step-down IC. ACDRV Gate control for entry Mosfets Should be ~25V if the bq25A IC detects a valid adapter. 3. Troubleshooting "No Power" (Dead Board) VCC pin → decoupling: 10 µF electrolytic + 0
If you are looking for the schematic to repair a module:
Pin 6 (ACDET): Detection pin, typically between 2.4V and 3.1V.