820-01958 no power

[Kyle93]

Arrived with minor liquid damage near trackpad connector, CD3217s and backlight area. Cleaned up components but stuck at 5V 0 amps

PP3V3_G3H 0v diode mode 0.350

PPVIN_G3H_P3V3G3H 1.070V 0.215 diode

PPBUS_G3H 0.620v 0.900 diode

What should be checked next??

 

[2informaticos]

Looks like USB-C problem.
5V input voltage should go through CD3217 chips until F3000/1.
Check the fuses and diode mode to ground at PPDCIN_G3H.

 

[Kyle93]

fuses are good.

.521 diode and 5.2V on PPDCIN_G3H

 

[2informaticos]

Then you must have 5V at R7020 too.
Post U7000 basic voltages; P_IN, AUX_DET, VDDA/P, EN_VR1, SMC_RST*, A/BMON, CHGR_CBC_ON.

 

[Kyle93]

AUX_DET 1.289V

VDDA 5V

VDDP 5V

EN_VR1 Using 01521 boardview for reference and EN_VR1 just shows as not connected??

SMC_RST only shows under u7000?

AMON 5.20V

BMON only shows under u7000??

CHGR_CBC_ON only shows under u7000??

 

[2informaticos]

I gave you shorter names, inside the U7000.
Please follow external names connected to same pins!!!

On 01521 boardview, CHGR_BMON appears at R5470.
Follow EN_MVR, instead of EN_VR1; sorry for mistake.

 

[Kyle93]

CHGR_BMON 0v

EN_MVR 0v

 

[2informaticos]

"AMON 5.20V"
Are you sure about this?
It is really strange value; check R7020/21/22 and traces.

 

[Kyle93]

R7020 has 5.20V on all four pins. 21/22 are good along with their traces.

AMON only appears on R5472 which is next to T2. Layout on 01521 is much different then 01958 in this area so no not 100% sure.

 

[2informaticos]

If you surelly located R5472, there must be less than 1V.

 

[Kyle93]

0.030V

 

[2informaticos]

"PPBUS_G3H 0.620v 0.900 diode"
Strange value; did you check with red probe at ground?
Also be aware, L7030 is not PPBUS_G3H; check at F7000.