When the power supply is overloaded is protects itself but shutting down immediately. Check for shorted pins in all the connector and USB ports. If no shorted pins, try this. Remove the machine from the docking station/port replicator. Remove all accessories. Remove all plugin items - hard drive, mo...

X32 is stone dead. Tracked power on system board through connector, fuse, pass transistor and to LM392 and three regulator transistors. Can't figure if LM392 is dead or being held off by some other circuit.

Anyone know where I can find a schematic, block diagram or circuit description?