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U6903:1 P3V3G3H_VBST 5.65v U6903:2 PPVIN_G3H_P3V3G3H 4.66v U6903:3 P3V3G3H_LX 1.31v U6903:9 P3V3G3H_FB 0.33v U6903:10 PM_EN_P3V3_G3H 0.06v

D6902:3 PPVIN_G3H_P3V3G3H 4.54v D6902:2 PPDCIN_G3H_CHGR_R 4.99v

Hi. I have an A1706 that gets only 5v 200mA on all four usb-c ports. Won't power on obviously. PP3V3_G3H shows 1.2v no matter which usbc I use. The ports looked funky. I took both out and connected a brand new port. Made no difference. Diode mode to ground shows 0.331 on PP3V3-G3H

To do that I take off the usbc plate from the opposite of CD3215 side?

At this point do you think there is any problem with the CD3215 chips?

Sorry. I am still learning. Can I use FlexBV to find a trace and, if so, what can I determine with this?

I saw a video where Louis said that this was very complex. I don't think this is a solution at the moment. Also, I want to be sure that this is absolutely necessary.

Can you explain this in detail, please.

After using the UC I give the motherboard an alcohol bath. I thought this might be causing the problem but have since dried some boards without the alcohol and have had same results with the white residue.

Agreed

What do you think I could do? Anything I can do to confirm the problem?

I am using de-ionised water. What do you mean by, do not add alcohol?

Yes. The two damaged pins (which are on the same side of the board (CD3215 side) but different socket) are the only ones that give a different result. Those pins give OL on the damaged board and 0.600 on the working.

I have had problems with white residue left on the motherboard after using the ultrasonic cleaner. Usually the white residue appears in very small areas between contacts on chips. What have you found is the best way to avoid this?

USB-C pins check diode mode to ground CD3215 side 0 OL OL 0.132 OL OL OL OL 0.132 0.331 0.329 0 0 OL OL 0.132 OL OL OL OL 0.131 0.333 0.333 0 Opposite CD3215 0 OL OL 0.131 0.600 OL OL OL 0.130 0.333 0.332 0 0 OL OL 0.130 0.596 OL OL OL 0.128 0.331 0.330 0

Diode mode to ground PP1V8_UPC_XB_LDOA shows 0.482 PP3V3_UPC_XB_LDO shows 0.481 PP1V1_UPC_XB_LDO_BMC shows 0.458 PP1V8_UPC_XB_LDOD shows 0.449

Diode mode to ground PP1V8_UPC_XA_LDOA shows 0.485 PP3V3_UPC_XA_LDO shows 0.478 PP1V1_UPC_XA_LDO_BMC shows 0.461 PP1V8_UPC_XA_LDOD 0.453

Diode mode to ground C7030 is showing 0.380

Diode mode to ground C7023 is showing 0.520 C7020 is showing 0.397

Ah, okay. My mistake. I'll send the correct readings. Could you elaborate on this, please.