820-00165 no power on P5v_s4rs3_vfb1

[Roshon]

there was water damage on R7520 and R7523 i change them but no power

 

[2informaticos]

Post U7501 basic volatges; pins 23, 12, 13, 22, 29, 21.
Any pulse at L7520?

 

[Roshon]

U7501 basic volatges; pins 23, 8.4V
12, 3.4V
13, 1.9V
22, 3.3V
29,5.0V
21.3.4V
L7520 no Voltage no pulse

 

[2informaticos]

So you get 3V3_S5 at L7560.
What about 3V3_SUS and PM_BATLOW_L?
Be sure to use original Magsafe 2 charger.

 

[Roshon]

3V3_S5 at L7560. 3.3v
3V3_SUS 3.3v
and PM_BATLOW_L? 3.3v

 

[2informaticos]

Post PM_RSMRST_L, PM_PWRBTN_L, PCH_DSWVRMEN, PM_DSW_PWRGD and all RTC signals (4).
Trigger SMC_ONOFF_L and check for drop pulse at PM_PWRBTN_L at same time.