Includes SATA and PCIe interfaces for storage and connectivity. Verified Power Rails & Behavior
Often used with Intel Sky Lake-U or Kabylake-U processors.
Pay close attention to naming conventions. A signal ending in # (e.g., PLTRST# ) indicates an active-low signal, meaning it must drop to 0 Volts to be considered "ON" or active.
When dealing with a broken LAE791P board, look for these common, documented failure points using your multimeter and schematic. 1. Short Circuit on the +B+ / Main Rail
The charger inputs voltage via the DC jack, passing through protective reverse-polarity diodes and input MOSFETs controlled by the charging IC (often an Intersil or Texas Instruments chip). lae791p rev 20 schematic diagram verified
DDR4 SODIMM Slot + Onboard DDR4 Memory (model dependent) Super I/O / EC Controller: ENE KB9022Q D
A verified schematic diagram of the LAE791P Rev 2.0 offers several benefits, including:
Check the voltage on the current sensing resistor (often designated as PR302 or similar near the DC jack input).
Disclaimer: Always scan downloaded files for viruses and ensure the revision number matches your physical motherboard. Conclusion Includes SATA and PCIe interfaces for storage and
This article provides a comprehensive breakdown of the , including where to find authentic copies, how to verify their accuracy against physical hardware, key component analysis, power rail tracing, and troubleshooting methodologies.
: Crucial rails for the KBC and BIOS chip. If these are missing, the laptop will not start. +1.35Vpositive 1.35 cap V +1.2Vpositive 1.2 cap V (DDR4): RAM power supply. : CPU power. C. System Management
Laptop turns on with a blue light but shows no display, or spins the fan at maximum speed instantly.
Identifying the wrong inductor (coil) as the main power rail. A signal ending in # (e
This is an interactive, visual map of the physical PCB (Printed Circuit Board). It shows you exactly where each component is located. When used with software like OpenBoardView , you can click on a component in the boardview and see its physical location and the schematic page where it's detailed. This is essential for physically tracing faults and testing components with a multimeter.
Intel Core 7th or 8th Generation H-series processors (e.g., i5-7300HQ, i7-7700HQ).
A schematic outlines the following typical startup sequence: DC In: Validates the presence of power via the charger. Always-On: The PWM chip produces main standby voltages.