La-c781p Schematic -

The BQ24725A IC must output ACDRV (approx. 24V–31V) on pin 4 to drive the N-channel MOSFETs.

If this voltage is gone, the keyboard controller cannot start the power sequence. BIOS Issues: La-c781p Schematic

Based on technician feedback, the LA-C781P often suffers from a few specific issues: A. The "PS_ID" Circuit The BQ24725A IC must output ACDRV (approx

Without the schematic, you’d never trace the EN signal back to a self-starting regulator. La-c781p Schematic

Check all coils for low resistance to ground before injecting voltage. A short on the PCH or CPU lines often prevents the board from triggering.