Hi, I'm working on a Surface Pro 4, I initially hijacked this thread https://www.badcaps.net/forum/showthread.php?t=82202 to keep all the info in one place since it does not seem to be a popular repair but decided to start my own thread since it is not getting any attention. I apologise if this is not allowed.
The device is not booting, I don't get the 8.5V that mattpd spoke about. I get 15V on source and gate of Q7002. None of the mosfets are shorted. I do get +3P3VAS. No voltages present on the BQ24770. None of the coils are shorted. I did reflow the IT8528VG but no difference. The usual suspects, diodes and resistor, are good also. I purchased IT8528VG from M.Sentrix but I confirmed yesterday that they are new, some sites refer to it as a PMIC but the schematic refers to it as the EC and to the best of my knowledge, the EC needs to have special programming to work. Any guidance would be much appreciated, thanks.
The device is not booting, I don't get the 8.5V that mattpd spoke about. I get 15V on source and gate of Q7002. None of the mosfets are shorted. I do get +3P3VAS. No voltages present on the BQ24770. None of the coils are shorted. I did reflow the IT8528VG but no difference. The usual suspects, diodes and resistor, are good also. I purchased IT8528VG from M.Sentrix but I confirmed yesterday that they are new, some sites refer to it as a PMIC but the schematic refers to it as the EC and to the best of my knowledge, the EC needs to have special programming to work. Any guidance would be much appreciated, thanks.
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