820-00164 No power No light

Hi!
I/O BOARD 15.25 V
PPCDIN_G3H
Fluctuates fast non stop from 0.503v - 1.9v
PP3V42_G3H
Fluctuates fast non stop from 0.159v - 1.2v
L7130
same
L7630
Same
L7430 0V

L7560
fluctuate

L7520 0.168V

q7130 and Q7630 flashes intermittently under thermal cam.
 

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2informaticos

Administrator
Staff member
PPDCIN_G3H comes from DCIN board.
Check J7000 and continuity between MLB and DCIN boards.

Did you try known good DCIN board?
 
This is a new board i got from ebay! I have no more. Before getting the new board i was having no power!

J7000
Fluctuate.
If i measure the connector directly 15,25 V

Im not sure MLB stand for!
 
I replaced q7130 and q7630, now i got some voltages back. Charger still has no green light. fan spins for a couple of seconds den stop.

PPDCIN_G3H 14.66 V
PP3V42_G3H 3.380 V
PP3V42_G3H 8.58 V
pp3v3_s5 3.3V
PP5V_S4RS3 0.0 V
pp3v3_sus 3.3V
L7430 0.0 V
L7630 0.0 V
L7310 0.0 V
L7320 0.0V
L7130 8.58V

L7560 3.3V
L3095 0.0V
L7520 0.0V

ALL_SYS_PWRGD 0.59 V
 

2informaticos

Administrator
Staff member
"
PP3V42_G3H 3.380 V
PP3V42_G3H 8.58 V"
???

Test first SMC bypass mode.

Check PM_RSMRST_L, PM_PWRBTN_L, PCH_DSWVRMEN, PM_DSW_PWRGD, SMC_ADAPTER_EN, PM_BATLOW_L and all PCH's RTC (DC) signals.
 
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