Lae791p Rev 20 Schematic Diagram Verified Page
If you are currently troubleshooting a specific issue, I can help you locate the or voltages for: A laptop that won't turn on (+3VALW / +5VALW rails) A laptop with no display (+VCC_CORE or BL ON signals) Charging issues (ACOK and charging MOSFETs) Which area should we focus on?
Switched on from the always-on rails via load switches when the system receives the power button signal. lae791p rev 20 schematic diagram verified
Ensure the voltage on the power button pin drops from 3.3V to 0V when pressed, and toggles the corresponding pin on the EC chip. Conclusion If you are currently troubleshooting a specific issue,
The ceramic filter capacitors attached to the +19V ( VIN ) rail near the CPU and GPU buck converters are prone to physical degradation. A shorted capacitor here will pull the entire charging rail down, causing the power adapter's LED indicator to blink or shut off entirely. Charging IC and Input MOSFETs Conclusion The ceramic filter capacitors attached to the
If you are currently troubleshooting a specific issue, I can help you locate the or voltages for: A laptop that won't turn on (+3VALW / +5VALW rails) A laptop with no display (+VCC_CORE or BL ON signals) Charging issues (ACOK and charging MOSFETs) Which area should we focus on?
Switched on from the always-on rails via load switches when the system receives the power button signal.
Ensure the voltage on the power button pin drops from 3.3V to 0V when pressed, and toggles the corresponding pin on the EC chip. Conclusion
The ceramic filter capacitors attached to the +19V ( VIN ) rail near the CPU and GPU buck converters are prone to physical degradation. A shorted capacitor here will pull the entire charging rail down, causing the power adapter's LED indicator to blink or shut off entirely. Charging IC and Input MOSFETs