: Like most Compal boards, it follows a strict power-on sequence starting from +19VB (adapter input), followed by the creation of +3VALW and +5VALW (Always-On) rails.
Are you currently troubleshooting a or a display problem with this specific motherboard model? la-g121p schematic
The LA-G121P is a budget-oriented motherboard typically equipped with low-power Intel processors. : Like most Compal boards, it follows a
He scrolled to the charging circuit. The schematic pointed him to a tiny chip, PUB1 . This was the "Governor" of power. If this chip didn't feel "safe," it wouldn't send the signal to let the 19 volts through.He checked a tiny resistor nearby, PRB3 . On the schematic, it was rated at 10 Ohms. On the board? It was blown wide open—a microscopic crater in the silicon landscape. He scrolled to the charging circuit
: The USB-C controller (often a TPS series) can fail, preventing the laptop from negotiating 20V from a USB-C charger. Short on +3.3V_ALW