Ensure the P-channel switching MOSFETs in the DC-IN section are opening correctly to allow power into the system. 2. Critical Power Rails
The LA-C781P schematic is beautiful because it represents a puzzle. Dell didn't want you to fix this board; they wanted you to replace it. But the schematic empowers you to outsmart the planned obscurity. La-c781p Schematic
Some notable components on the La-C781P schematic include: Ensure the P-channel switching MOSFETs in the DC-IN
Always disconnect the battery and CMOS battery before measuring resistance or soldering to prevent accidental shorts. La-c781p Schematic