Basically any MOSFET in the same package should work. You just need to know if it is P-Channel or N-Channel.
Btw. check if it is really a MOSFET. If it is near the Charging-Connector, it could also be an ESD-Protection Array. They are supposed to fail open, but often enough they fail short, taking out traces, connectors or just suck away enough power so the Laptop doesn't turn on.
If the computer turns on with the component desoldered, it was most certainly a ESD-Diode.