La-g121p Schematic May 2026

When the adapter is plugged in, the EC (MEC1418) uses the schematic to turn on:

Based on the design architecture of the X1 Carbon Gen 7 (LA-G121P): la-g121p schematic

Fingerprint Reader Issues:

Thunderbolt 3 / USB-C Issues:

CMOS Battery:

This is the most referenced section for repairs. The power sequence is critical. When the adapter is plugged in, the EC

CPU VCore (VCORE): Generated by a high-power PWM controller. If this is missing, the CPU is not running.

RAM Power (VDDQ): 1.2V rail for DDR4 memory.