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Usually utilizes the ISL or BQ series for battery management.
Use a lab power supply to inject voltage safely if you find a short circuit.
The (e.g., dead, spinning fan but no image, or liquid damage). lah103p schematic new
Map out 19V (B+), 3.3V/5V Alw, and RAM voltage.
The LA-H103P (also known as the GDI4A) typically supports Intel 10th or 11th Gen processors (Ice Lake or Tiger Lake) or AMD Ryzen alternatives depending on the specific sub-model. Combined CPU/PCH (SoC) design. Usually utilizes the ISL or BQ series for battery management
Look for the "Always On" controller. If this IC is hot or missing its LDO outputs, the laptop will appear completely dead.
Corrupt BIOS data is a frequent cause of "lights on, no display." Use the schematic to find the SPI Flash chip pins for reprogramming. Map out 19V (B+), 3
On versions with USB-C charging, the controller IC can fail due to surges. How to Use the Schematic with a Boardview
💡 If you can't find a component labeled on the board, search the schematic for the "PU" (Power Unit) or "PQ" (Power Quarter/Transistor) number to find its functional group. If you'd like, I can help you further if you tell me:
Always keep your multimeter ground lead on a solid screw hole or shielding.
