I've got a smoothie damaged board that won't boot. I'm not getting PM_PCH_APWROK nor PM_PCH_PWROK. On U1950 I need ALL_SYS_PWRGD and CPUVR_PGOOD.
I'm not getting ALL_SYS. It comes out of Q8151, but that's where I'm stuck.
For Q8151 I have PP3V3_S5_1v5PGOOD coming in just fine, C8134 is fine. R8136 works fine. I'm not sure if I'm supposed to have 1.5v or 3.3v going into Q8151. When I have power running through the board there's no resistance from pin 2 to 6, and when there's no power there's no resistance from 1 to 6. But I still get no voltage coming out of 6, i.e. no DELAY_1v5S0_PGD and no ALL_SYS_PWRGD.
The other half of the MOSFET is an s0 rail, so I assume we don't need it to power it on initially. Would it be safe to assume the mosfet is bad? Does that happen often?
I'm not getting ALL_SYS. It comes out of Q8151, but that's where I'm stuck.
For Q8151 I have PP3V3_S5_1v5PGOOD coming in just fine, C8134 is fine. R8136 works fine. I'm not sure if I'm supposed to have 1.5v or 3.3v going into Q8151. When I have power running through the board there's no resistance from pin 2 to 6, and when there's no power there's no resistance from 1 to 6. But I still get no voltage coming out of 6, i.e. no DELAY_1v5S0_PGD and no ALL_SYS_PWRGD.
The other half of the MOSFET is an s0 rail, so I assume we don't need it to power it on initially. Would it be safe to assume the mosfet is bad? Does that happen often?