Lae791p Rev 20 Schematic Better ((exclusive))

| TP Name | Signal | Location | |----------------|----------------------|------------------------------| | TP1 | +PWR_SRC (19V) | Near PF1 | | TP5 | +3VALW | Left of EC | | TP9 | +5VALW | Near USB connector | | TP12 | PM_SLP_S3# | Under PCH (small pad) | | TP19 | PLTRST# | Next to SPI flash | | TP28 | EC_RSMRST# | Near EC pin 96 |

: Locate the PWM IC responsible for the 3V and 5V rails. The schematic will help you check the Enable (EN) signals and Power Good (PG) pins to see if the IC is faulty or being shut down by a downstream short. Black Screen (No Display) : Fault : Fan spins, but there is no image on the LCD. lae791p rev 20 schematic better

: Complex voltage regulation modules (VRM) for the CPU and GPU, including 3V/5V "always-on" rails. Common Faults & Troubleshooting with the Schematic | TP Name | Signal | Location |

If you describe your or what part of the board you’re working on (power, USB, Ethernet, display, etc.), I can give you targeted guidance without needing the full proprietary schematic. Would that help? : Complex voltage regulation modules (VRM) for the

or a step-by-step visual power-up sequence to aid in diagnosing "No Power" or "No Display" issues. Mapping the transition from and finally to the S0 state rails ( 2. Clearer Component Mapping (Boardview Integration) While the schematic tells you components are connected, it doesn't tell you Recommendation: Use the schematic in conjunction with the LA-E791P Boardview file (.cad or .brd)