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A: No. The LA-E802P is for the Dell 15-3558 series. While similar, the power distribution and EC pins differ. Using the wrong schematic will mislead you.
2.0 (Commonly documented as Rev 1.0, but Rev 2.0 shares significant architecture) Application: HP 15-BS Notebook series Power Architecture & Components
: Energizes the Embedded Controller chip and the SPI BIOS Flash memory IC. la-e801p rev 2.0 schematic
Measure voltage on Pin 8 of the BIOS chip ( +3V ). Hook up an oscilloscope to Pin 1 (CS#) or Pin 2 (DO) to see if data transmission occurs during boot. If data is flatlining, use an EEPROM programmer to flash a clean, verified BIOS dump containing a cleared ME Region matching the motherboard's clean firmware profile. 5. Schematic Reading Tips for the LA-E801P
Check for +PWRSRC right after the input MOSFETs. If 19V is missing, look for a short-circuit to ground on the main rail using a multimeter in continuity mode. If 19V is present but 3V/5V is missing, check the enable pins on the 3V/5V PWM chip. Issue B: Short Circuit on +3VALW or +5VALW Using the wrong schematic will mislead you
[DC-IN / Battery] ──> [+19V / +PWRSRC] ──> [+3VALW / +5VALW] ──> [+1.0V / +1.2V / +1.8V] ──> [VCC_CORE] Main System Rails
screen backlighting power protection fuse near the display port to see if it blew during hot-plugging. Sourcing Document Downloads Safely schematics|boardviews| ARCHIVE – Telegram Hook up an oscilloscope to Pin 1 (CS#)
Since the is not a consumer-grade product (like a sound card or GPU) but rather a bare logic board/controller PCB typically used in industrial computing, LED display control, or embedded systems, writing a "user review" requires a technical perspective.
Based on common laptop motherboard coding, here is what this board number likely refers to and how you can proceed.
Before applying any power, use a digital multimeter in resistance mode (ohms) to check the major large inductors (coils) on the board against system ground. Low resistance (under 1-2 ohms) on +3VALW or +5VALW indicates a direct short circuit.
After triggering the power switch, the system transitions through ACPI operational states (