Model: HP Probook 4540S
Board id: Probook 4540S 11241-1 S-Series Riche
Laptop can't start. 19V is ok. But there is no volt on ADP_EN line. So 19V can't pass PU4001. When remove PQ4001, it' 3.3V on ADP_EN Line. But with PQ4001 there is no volt on ADP_EN. PQ4001 is ok. I replace PQ4001 with same mosfet. But nothing change. Need help.
Board id: Probook 4540S 11241-1 S-Series Riche
Laptop can't start. 19V is ok. But there is no volt on ADP_EN line. So 19V can't pass PU4001. When remove PQ4001, it' 3.3V on ADP_EN Line. But with PQ4001 there is no volt on ADP_EN. PQ4001 is ok. I replace PQ4001 with same mosfet. But nothing change. Need help.