Hi good Friends., today working on a Macbook Pro A2289, Logic board 820-01978-A. The history was liquid spill, Cleaned & replaced all corroded components & now the logic board shows 20v & .01amp on the meter. Not taking in any amps. Upon trouble shooting I get the required stable voltages 5V, PP3V3_G3H 3.3V but no PP3V3_S5. Checked the schematic, assume that this is generated from U7800. Checked all the Input/Output voltages on this chip. All is fine, except PP3V3_S5 is missing. Resistance from GND to PP3V3_S5 is 146 Kohms. First I need to make sure whether PP3V3_S5 is generated from this chip??? Thanks in advance
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Logic Board 820-01987-A missing PP3V3_S5
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It could be but personally cannot keep up with the madness of each model as it varies with the direction of the wind. THIS model does require a charged battery to boot. Would you have a battery connected? Ghettoware.
reference:
https://boards.rossmanngroup.com/thr...harging.64804/
See post # 10.
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