Attached schematic 🙂.

Laptop gives no signs of life. No fan and no CPU heat.

Think Engine BD4179MWV is hot on plugging in *AND* pressing the power button.

Discovered short to ground on VCC5M power delivery IC NB690GRP (5 volt line, not the high current VCC5M_PD) which is one of the ways that chip is powered. I'm puzzled.

Nothing else is warm on the board. CPU resistances are OK, 9V VSYS line is present from the BMIC. All misc and cables are disconnected.

What do you guys think happened? I've got two theories:

If the...