Websites like Vinafix or Badcaps often hold these files.
Locate the 3V/5V PWM controller IC. Verify that it receives VIN on its enable pins and outputs exactly +3.3V_ALW and +5V_ALW . Step 3: EC Awake & Power Button Pulse
Schematic feature: Rev 2.0 adds labeled explicitly on the diagram near these critical nodes—a repair-friendly upgrade.
Onboard DDR4 RAM (usually 4GB) + 1x DDR4 SODIMM Slot for expansion. Graphics: Integrated Intel HD Graphics (UMA architecture). La-e791p Rev 2.0 Schematic Diagram
Supplies core voltage to the Platform Controller Hub. 4. Core Voltage Rails ( +VCC_CORE , +VCC_GT )
Be careful when downloading .pdf or .dz (BoardView) files from forums. Always scan files with an antivirus before opening.
The KBC (embedded controller) must receive power and interact with the BIOS chip. Websites like Vinafix or Badcaps often hold these files
: Missing CPU core voltage is a frequent diagnostic challenge. Repair guides suggest checking the PWM controller and power FETs associated with the +VCC_CORE line. Resources & Downloads
Integrated Platform Controller Hub (PCH) within the CPU package (MCP architecture).
For the professional repair technician, mastering this schematic means reducing debug time from hours to minutes. For the engineer, it offers a transparent view of modern laptop power management. Whether you are tracing a shorted capacitor or reverse-engineering a proprietary signal, the Rev 2.0 schematic remains the definitive source of truth. Step 3: EC Awake & Power Button Pulse
Powers the Super I/O (EC) and the BIOS chip even when the laptop is turned off.
If you have an LA-E791P board on your repair bench that is completely unresponsive, follow this diagnostic sequence using the schematic diagram:
Which of the schematic you are currently analyzing (e.g., Charging Circuit, CPU VRM) Share public link
The is an indispensable tool for component-level repair. Whether you are dealing with a liquid spill or a random power failure, having the circuit map allows you to work with surgical precision rather than guesswork.
If you are troubleshooting a "No Power" or "No Display" issue, these community-vetted resources can provide the specific Rev 2.0 files or guidance: