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I have replaced the charging port and now I get 20v 200ma however there is no post. I check the traces and they are good. I then checked all the old readings and there is no change.

But I didn't do anything to repair the original problem. It just fixed itself. I don't expect that to last.

Yes. Displayed correctly until after i put password in and it was loading into the operating system. When it got to the desktop it looked better but not perfect. It ran sluggishly for an hour before I powered it off.

I connected the drive and it booted, but showed signs of gfx failure.

I plugged in the power this morning and it's getting 20v I didn't change anything.

I checked again and PCH_PWRBTN_L is dropping to 0.34v I don't understand why that didn't happen the first time. I was doing it simultaneously.

Yes, at the same time. Correct. 5v on both usbc and 13v on PPBUS_G3H

When I trigger SMC_ONOFF_L to ground there is no change at PCH_PWRBTN_L. Stays at 3.3v

Could you explain this procedure in more detail, please.

Yes. PP3V3_S5 gives 3.32v

PPVIN_G3H_P3V3G3H 12.73v CHGR_BMON 0v TBA_VDDP 5.11v TBA_AUX_DET 1.25v CHGR_AMON 0v SMC_AUX_OK 3.41v SMC_RST_IN 0v TBA_VDDA 5.11v

No, apologies. That was DIV_PPBUS_G3H. PPBUS_G3H is giving 13.04v and 0.400

The customer says that one day it was working and the next not. So far I cannot see any signs of corrosion on any component. The keyboard keys in the bottom right show signs that there may have been a spillage at some point. They are not springing back up as fast as the other keys, but it is...

Motherboard looks fine but only asking for 5v on both usb-c. U3100 Pin 2 PP1v8_UPC_XA_LDOD = 1.8v, 0.46,, Pin 12 PP3v3_UPC_XA__LDO = 3.39v, 0.486,, Pin 35 PP1v1_UPC_XA_LDO = 1.1v, 0.467,, Pin 75 PP1v8_UPC_XA_LDO = 1.79v, 0.49. U3200 Pin 2 PP1v8_UPC_XB_LDOD = 1.79v, 0.457,, Pin 12...

Ah okay. These are the measurements I got from the pads. R6908:1 P3V3G3H_VBST_R 5.67v R6908:2 P3V3G3H_VBST 5.67v P3V3G3H_VBST diode mode 0.579 P3V3G3H_VBST_R diode mode 0.579 R6910:1 P3V3G3H_FB 0.33v R6910:2 P3V3G3H_FB_R...

Indeed, you are right. Apologies. When checking the resistors in diode mode, should I use the test pads also?

F7000 diode mode to ground 0.400

U7000:2 TBA_VDDA 4.95v U7000:17 TBA_VDDP 4.95v U7000:18 TBA_AUX_DET 1.24v U7000:28 SMC_AUX_OK 0.35v U7000:39 SMC_RST_L 0v

Ah, okay. Very helpful. Thank you. Did the voltage again with test pins. U6903:1 P3V3G3H_VBST 5.65v U6903:2 PPVIN_G3H_P3V3G3H 4.66v U6903:3 P3V3G3H_LX 1.04v U6903:4 GND U6903:5 P3V3G3H_AGND 0v U6903:6 U6903:7 P3V3G3H_AGND...

It's very hard to get readings from that chip. What tool do you guys use?