820-00165 A1466 no power no led

[lincev]

Hi, i have this board with liquid damage in the keyboard area but it seems I haven't found any corrosion/damage on the board

some voltages:

PPBUS_G3H 0.59V

PP3V3_SUS 0v
PP3V3_S0 0v
PP3V3_S3 0v
PP5V_S0 0v


U5110

1_ 3.39V
3_ 3.39V
4_ 2.72V
5_ 3.34V
6_ 3.37V
7_ 3.39V
8_ 3.26V

thanks for all

 

[2informaticos]

Diode mode to ground at PPBUS_G3H?

Post U7100 basic voltages: 1, 2, 3, 9, 12, 13, 14, 15, 17, 19, 20, 27.

 

[lincev]

Diode mode to ground at PPBUS_G3H= 800..900.. 1200.. 1900.. out range

resistance all scale out range except scale 200M 00.8 ohms

U7100

1 CHGR_AGATE=15.30v
2 CHGR_DCIN=16.10v
3 CHGR_ACIN=0v
9 CHGR_AMON=0.01v
12 PP3V42_G3H=3.39v
13 CHGR_RST_L=3.35v
14 SMC_BC_ACOK=0v
15 CHGR_BMON=0.03v
17 CHGR_CSO_N=0v
19 PP5V1_CHGR_VDD=5.05v
20 PP5V1_CHGR_VDDP=5.05v
27 CHGR_CSI_N=0v

 

[2informaticos]

"3 CHGR_ACIN=0v"
Fix this first...

BYW, STOP checking diode mode with black probe on ground.
This way is rarely used: and never as first checking.

 

[lincev]

sorry I already know forever

PPBUS_G3H=122 value


"3 CHGR_ACIN=0v"
Fix this first...

I try this, thanks !

I changed U7100 and C7111 now I have 4.3v in CHGR_ACIN but I lost voltages pin 19 and 20

new voltages:

1 CHGR_AGATE=15.30v
2 CHGR_DCIN=16.10v
3 CHGR_ACIN=4.29v
9 CHGR_AMON=0.01v
12 PP3V42_G3H=3.39v
13 CHGR_RST_L=3.35v
14 SMC_BC_ACOK=3.35v
15 CHGR_BMON=0.03v
17 CHGR_CSO_N=0v
19 PP5V1_CHGR_VDD=0v
20 PP5V1_CHGR_VDDP=0v
27 CHGR_CSI_N=6.06v