The standby IC creates the +3VALW and +5VALW voltages. Without these, the power button will do nothing. The schematic will show you which "Enable" pins are required from the EC to trigger these rails. BIOS and EC Firmware
The LA-E791P relies heavily on the communication between the BIOS chip and the KB9022Q. If you have voltages but no boot, the schematic helps you verify the SPI bus signals (CS, CLK, Data) to ensure the firmware is being read. 4. Professional Repair Tips La-e791p Rev 2.0 Schematic Diagram
The La-e791p Rev 2.0 schematic was designed using , leveraging: The standby IC creates the +3VALW and +5VALW voltages
Integrated Intel HD Graphics or dedicated AMD Radeon R17M with DDR3L VRAM. Memory: Dual-channel DDR4 SO-DIMM slots. La-e791p Rev 2.0 Schematic Diagram