La-e791p Rev 2.0 Schematic Diagram [cracked] Jun 2026

The LA-E791P is a motherboard primarily found in popular HP consumer laptop models, such as the HP 250 G6 and HP 15-bs series. This article aggregates verified technical data, pinouts, common fault points, and the necessary steps to source the schematic and BoardView files safely.

Start: No power ↓ Measure +3VLP at JP1 pin 1 → No → Check DC-in circuit (page 5) ↓ Yes Measure +3V_ALW → No → Check PU402, EN signal from SIO (page 28) ↓ Yes Measure EC_PWRBTN# toggle when pressing power button → No → Replace SIO or check button (page 8) ↓ Yes Check PM_PWRBTN# to CPU → No → Broken trace from SIO to CPU (page 26) ↓ Yes Check VR_READY (should go high after Vcore) → No → Replace RT8239B or MOSFETs (page 30) ↓ Yes Check ALL_SYS_PWRGD → No → Check +1.2V_DDR, +1.8VS, +0.675VS (page 15) ↓ Yes Check SIO_PWRGD → No → SIO firmware corrupted → Reflash EC BIOS ↓ Yes Display & boot La-e791p Rev 2.0 Schematic Diagram

Before you press the power button, you need +3.3V_ALW and +5V_ALW. The LA-E791P uses a TPS51225C (or similar) for this. The LA-E791P is a motherboard primarily found in

Common fault: If ACDET is below 2.4V, the board will not turn on. Check voltage divider resistors (R5001/R5002) listed in the schematic. The LA-E791P uses a TPS51225C (or similar) for this