Discrete AMD R17M Series (VRAM Included) or Integrated Intel HD Graphics Memory: DDR4 SO-DIMM slots
Missing a ground return for a high‑current regulator (e.g., no GND via or too narrow trace) – flag this for layout.
The EC then transmits PBTN_OUT# to the PCH, signaling it to exit sleep states (S5/S4/S3). 4. Run Rails and Core Voltages (+3V, +5V, +1.2V, VCC_CORE)
If the board will operate >100 MHz, consider running a (e.g., using HyperLynx, ADS, or the built‑in SI tools of your CAD).
Check the current-sensing resistors and the charging controller IC. Verify the ACIN signal on the IC pin to ensure the motherboard detects the power adapter. 4. How to Read the LAE791P Schematic Layout
DC-in jack (PJ1), Input MOSFETs (PQB1, PQB2), and Current Sensing resistors. Rail: The main system power rail ( +VINpositive cap V cap I cap N
Connect your power supply. Check the main current sensing resistor (shunt) to verify that 19V is distributed through the B+ rail.
If any of those checks return , address them before you close the review.