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Found J3700 to have an issue but having a hard time tracking down a replacement. Anyone have a website or source I can order this connector from?

82.5 kOhm (if I measured that correctly. same as diode mode without the meter on diode mode?) Was going to give the board another visual inspection so searched BV for all points SMC_PM_G2_EN is at.... they now all measure 3.4V ... Area around SMC is clean.

I have continuity from pin 3 all the way to U7700. U7700 was replaced and issue persisted.

Started measuring rails from scratch and hit a dead end at PP5V_S4RS3. Leading this all the way back to the DC board of which I have tried 3, all resulting in no power. I have no schematic for the DC board (820-3453-A) but there's a Cap that measures 14.87V on one side and 0V on the other...

And replacing Q5500 has same result.

jadao and dukefawkes I will check on your suggestions in a moment. I found that F7140 was bad so replaced it, now get same 8.6V on both sides. Re-measuring the G3H line I run into a dead end at Q5500, I think. It has the right voltage coming in but is not shooting out PBUS S0 VSENSE to the...

0.857 on R7750, 0.570 on R7751 both sides.

Yessir, have been using KG board since last time.

R7750 is 000.2 ohm R7751 is 000.1 ohm

1 - 1,171v 2 - 0L 3 - 0.857v 4 - 0.581v 5 - 0.543v 6 - 0.697v 7 - 0.696v 8 - 0.551v 9 - 0.764v 10 - 0.458v

I messed up in my original post, I did have S5: PP5V_S5 - 5V PP3V3_S5 - 3.3V Edited original post to correct that typo that should say "S4" As for the voltages you asked for: P3V3S5_EN_R - 3.4V SMC_PM_G2_EN - 1.04V P5VP3V3_VREG3 - 3.3V and of course PP5V_S5 - 5V S4 and up I have 0V

L7520 is 0V on both sides, no pulses I can tell of (no oscilloscope available either). Magsafe light works.

I measured all the points the BV highlighted when I searched PPBUS_G3H, a coil is not shown as one of those points. I also can't find a coil before the fuse in the schematic. The fuse is good though.

Sent my way with problem listed as "not recognizing SSD's" this was dead on arrival. Found corrosion and rusted pads in the areas between U1930 and U1950. Cleaned it all up, restored pads and replaced several components: R1920 Q1920 R2023 R1691 U1900 U1930 U1950 and Q8150 All I get are the G3H...

It is but only with the ribbon cable connected. Without the cable the unit boots but magsafe shows no light.

I measured several times to be sure. No power is applied at the time.

Tested with other I/O board, same issue. PPBUS_G3H = 8.6V. PP3V42_G3H = 3.4V. (same values with or without cable) and connectors look good on both ends.

Alright measured again. Diode mode on pin 3 = 0.000 - 0.001V Diode mode on pin 4 = 0.001 - 0.002V

Had to replace F7140 again, now get 8.6V on both sides. The unit now boots as long as the ribbon cable between board and DC board is not connected. With it, no boot, without it, boot. Searching for another cable to test but in the mean time someone may have seen this issue before? EDIT: Other...

14.30V on all pins of R7120. Magsafe light is orange.