820-00165

[Anterweb]

Had bad liquid damage .
Put through the US and came out nice and clean. but No power, no lights at all on charger,

using known good DC board and flex and Original charger,

Nothing in SMC- Bypass mode.
PLT_RESET_L 0.0V doesn't come high.
PPDCIN_G3H = 16.95
PPBUS_G3H = 0v

U7100
1) 0.00
2) 16.74
3) 0.00
9) 0.00
12) 0.105
13) 0.105
14) 0
15) 0
17) 0
19) 5.051v
20) 5.051v
27) 0

Bit stuck now, Should I be checking around U7090 ?

 

[2informaticos]

"3) 0.00
..............
12) 0.105"
Missing ACIN and 3V42_G3H.
Fis these first.

 

[Anterweb]

Any pointers for a starting point dude?

 

[2informaticos]

Check R7110 and U7090 voltages.

 

[Anterweb]

R7110 was giving me 16.95v on pin 1 and 0.047 on pin 2, I can see that pin 2 should be 4.3v so I replaced R7110 from a donor board same result, 16.95 on pin 1 and 0.047 on pin 2 so presume something else is causing this?

U7090 readings
1) 1.267
2) 3.422
3) 7.250
4) 3.425
6) 16.73
8) 16.74

 

[2informaticos]

I meant to check R7110 voltages, not its ohm value.
Diode mode to ground at ACIN pins?
Remove C7111 and check again; if good, replace C7111.
If still bad, change U7100.

"12) 0.105
..............
2) 3.422"
???

 

[Anterweb]

Those R7110 readings was voltages not ohm.
C7111 was bad! replaced that still had the same problem, Replaced U7100 and ping, I get green orange light on charger and now getting 3.848v on pin 2 of R7110

But still no fan spin and wont start in SMC_Bypass where to go now?

 

[2informaticos]

Post exact PPBUS_G3H voltage.
Do you get 3V3_S5/SUS?