The board turned on before hand but it was liquid damaged, I was able to fix some of the issue with the board, but the battery wasn't charging and so we replaced a few caps and still no luck, swapped out 4 batteries to see if the batteries were bad, and they were all good batteries after final testing. I checked for voltage at PPBUS_AON and no voltage was present which was odd, so I went ahead and replaced U5200 with a new chip since this has something to do with the charging issue and power issue. Replaced but no life still, so went ahead and look for shorts and found an odd area that is shorted to ground.
Cap C83B1 is shorted to ground and all the caps on that area, so the caps are not blown, the area in question is PP1V05_S2SW_VDD2H. This is showing up connected to the CPU and I am hoping it is not a failed CPU. Also I did not inject voltage more than 1 Volt into the board to find any shorts on PPBUS_AON but no shorts showed up. I am getting 5Volts and 0.06amps. So what I am confused as what could be the issue? Board looks fine, but I am leaning towards the CPU is failed. This could explain a lot more issues why the battery wasn't charging after replacing the caps that were faulty but donor caps. Board did turn on after we repaired it and now it's dead with a different issue. Any help would be appreciated.
Cap C83B1 is shorted to ground and all the caps on that area, so the caps are not blown, the area in question is PP1V05_S2SW_VDD2H. This is showing up connected to the CPU and I am hoping it is not a failed CPU. Also I did not inject voltage more than 1 Volt into the board to find any shorts on PPBUS_AON but no shorts showed up. I am getting 5Volts and 0.06amps. So what I am confused as what could be the issue? Board looks fine, but I am leaning towards the CPU is failed. This could explain a lot more issues why the battery wasn't charging after replacing the caps that were faulty but donor caps. Board did turn on after we repaired it and now it's dead with a different issue. Any help would be appreciated.
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