Usually managed by an IC (like BQ series). Key components here include input MOSFETs, which are often the first to fail due to liquid damage or surges.
What or short circuits have you found so far?
Strictly managed via USB Type-C power delivery controller chips. Critical Power Rails and Sequencing
The search results were a graveyard. Dead links. Outdated Russian forum posts. One sketchy file-hosting site promising the PDF in exchange for a credit card—a sure way to wake up to fraudulent charges for a cruise you never took. The schematic for the LA-D402P rev: 2.0 board was the Loch Ness Monster of laptop repair. Everyone had heard of someone who had it, but no one actually did. la-d402p schematic
motherboard schematic is a vital technical document for diagnosing and repairing high-end laptops, specifically identified with the HP Spectre 13t-v100
The "LA-D402P" is the board number used by the original design manufacturer (ODM) Compal, which produces this motherboard for HP. This specific motherboard is found inside the HP Spectre 13t-v100, a model known for its premium build quality and portability. It is also typically associated with the HP part number TPN-C127.
Locate the input protection MOSFETs near the USB Type-C ports on the schematic. Usually managed by an IC (like BQ series)
The LA-D402P motherboard (often labeled as the "BAL20" series) supports the following primary components:
A free, user-driven forum where members often upload diagrams or help trace them. Tips for Working with LA-D402P
When an LA-D402P board is "dead"—showing no signs of life, no LEDs, and drawing 0.00A on a bench power supply—your troubleshooting must follow the power rails sequentially using the schematic. Step 1: The Primary Input Rail ( +19V / VIN ) Strictly managed via USB Type-C power delivery controller
Often offers PDFs and BoardView files for purchase (Note: L402P is different from D402P, always double-check the exact suffix).
Always-on voltage rail powering the primary system standby circuits.