HP G7000 laptop that is totally dead. Pressing the power button gives nothing, connecting the AC adapter gives nothing. No lights or anything.

Troubleshooting:
Check AO4433 switching mosfets on power source side on mobo (just where power entering ).

You can easly use AO4407 as replacement as well.

You can use AO4433 or AO4407 instead of this.
Measure resistance between pin 4 and 1,2,3 / between 4 and 5,6,7,8 / between 1,2,3 and 5,6,7,8. You got datasheet so you can see how it is look inside. If there is no resistance that component is shorted. Otherwise there should be some resistance one way .