820-00281-a MacBook Pro "Core i7" 2.6 15" Touch/Late 2016). USB C power meter shows 0 amp draw on all ports. No signs of liquid dam

[ohannis]

Customer brought in the system stating that he changed the battery and the system did not turn on.
0.02A and 20v.
Q7040 pin 3 13.03v
f7000 13.076v
PP3V3_G3H 3.425V

No Water damage. Any help will be appretiate.

 

[2informaticos]

Do you get 3V3_S5/SUS?
Did you try the board alone on the desk, no battery connected?

 

[ohannis]

SMC_RST_L - 3.43V
PP3V3_G3H - 3.43V
HPWR_EN_L - 3.356V
TBA_VDDA - 5.142V
PPDCIN_G3H - 20.45V
PPBUS_G3H - 12.46V
PPVBAT_G3H_CHRGR_R - 12.65V
PM_EN_P3V3_G3H - 5.16V
SMC_BC_ACOK - 3.44V
PP3V3_S5 3.34
PP3V3_S5_POLARIS 3.34
PP3V3_S5_SMC_VDDA 3.44
PP3V3_S5_T139 3.34
PP3V3_S5_TBT_T_SW 0.02
PP3V3_S5_TBT_x_SW 0.02

all this are tested alone. on desk no battery

 

[2informaticos]

Post PM_RSMRST_L, PM_PWRBTN_L, PM_BATLOW_L, PM_DSW_PWRGD.
Trigger SMC_ONOFF_L and check for drop pulse at PM_PWRBTN_L at same time.

 

[ohannis]

PM_RSMRST_L 0.002v
PM_PWRBTN_L 3.31 v
PM_BATLOW_L 3.31v
PM_DSW_PWRGD 3.42v
SMC_ONOFF_L 3.4v

 

[2informaticos]

"Trigger..."
???
Check if PM_RSMRST_L goes high at same time too.

 

[ohannis]

PM_RSMRST_L 0.02 i unplugged the power and plugged it back still at 0.02

 

[2informaticos]

I try to be more specific.
"Trigger SMC_ONOFF_L" does NOT mean remove/reconnect charger!
Use pads of SW5200, or R5226, instead of power button.

 

[ohannis]

you mean i should jump the pads on SW5200 or R5226? sorry not sure exacttly how to do it.
Thanks

 

[2informaticos]

Yes, temporary short between pads.
In fact, solder wire to SMC_ONOFF_L and touch any ground point, like a metal shield.