Hi everyone!
Got a Lenovo X390 with a NM-B891 motherboard. When USB-C connected it negotiates 12v without any problems but no current is drawn. Inspection of the board shows this failed component:
Based on the boardview I was able to find this is a MP86901. I've removed this component and cleared the pads.
Connecting the charger again shows no improvement (12v, no current).
Resistence around this component (near the CPU) measure around 2.1 and 3 Ohm, probably acceptable for the location of the components being CPU related?
So far the only location I've been able to read less than 1Ohm is around PL0501:
PC0511/PC0509/PJ0502 all read ~0.3Ohm (probably my leads). PC0512 seems to be ok.
Component around it seem to be fine. Tried removing PC0511/PC0509 but resistance kept low.
Photo of the area:
Any ideas on what to check or if this is a known failure with this board?
Thanks everyone for help and insights!
Got a Lenovo X390 with a NM-B891 motherboard. When USB-C connected it negotiates 12v without any problems but no current is drawn. Inspection of the board shows this failed component:
Based on the boardview I was able to find this is a MP86901. I've removed this component and cleared the pads.
Connecting the charger again shows no improvement (12v, no current).
Resistence around this component (near the CPU) measure around 2.1 and 3 Ohm, probably acceptable for the location of the components being CPU related?
So far the only location I've been able to read less than 1Ohm is around PL0501:
PC0511/PC0509/PJ0502 all read ~0.3Ohm (probably my leads). PC0512 seems to be ok.
Component around it seem to be fine. Tried removing PC0511/PC0509 but resistance kept low.
Photo of the area:
Any ideas on what to check or if this is a known failure with this board?
Thanks everyone for help and insights!