I picked up this Precision 5550 to fix up recently, and found that the ISL9538 chip was burnt on pin 14 (CSIN). The two left side Type C ports negotiate at 20v, and the right side one only negotiates at 5v. I also found the EMI protection diode, DT35, was burnt on that side. I pulled the ISL9538 off, checked for any other obvious shorts, repaired the pad, and put a new one on. Now, I still do not get power, and there is a rapid clicking sound from somewhere on the board that I can't pinpoint.
Here are the voltages measured at that chip:
To note, DCIN at Pin 17 is low, fluctuates between 16.4 and 16.6v, and pins 1 2 and 3 are all low at 1v. I do not have any voltage on the main power rail.
Where should I be looking next? Does anyone know if there may be a boardview available for these (or the XPS 9500/9510)? Doesn't seem like there is, but figured I'd ask!
Here are the voltages measured at that chip:
To note, DCIN at Pin 17 is low, fluctuates between 16.4 and 16.6v, and pins 1 2 and 3 are all low at 1v. I do not have any voltage on the main power rail.
Where should I be looking next? Does anyone know if there may be a boardview available for these (or the XPS 9500/9510)? Doesn't seem like there is, but figured I'd ask!
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