820-3115 no green light

[ajdoc]

Cant find any liquid on board.

Tested with genuine 85W charger.
No green light.
Works OK with charged battery.
Connected charger and no light, battery indicator showing battery is not charging.

No fan spin with charger only.

Details with charger only:
PP18V5_DCIN_CONN @ 18.40V
PP3V42_G3H_REG @ 3.47V

R6929 @ 2KOhm

U6900 pin 1, 4 and 5 pulsing 2.67V-3.33V

U6901/1 and U6901/2 pulsing 2.30V - 2.65V
U6901/4 pulsing 2.67V - 3.33V
U6901/5 @ 3.47V

Any idea?

 

[2informaticos]

PPBUS_G3H w/ and w/o battery?
If SMC_BC_ACOK is pulsing, some other pins of U7000 do the same.
Post voltage for 2, 3, 12, 13, 9, 15, 10, 20.
Measure onboard R7080/81 and R7085/86 using ohm scale.

 

[2informaticos]

"U7000/2 pulsing 4.50V-5.40V"
You should find aprox 16V.

"U7000/3 @ 4.30V"
That means =PPDCIN_S5_CHGR is good.

Check D/R7005. If both good (I doubt), change U7000.
If R7005 heats up, could be the case...

"U7000/9 @ 4.69V"
It happens becaus of this
"27/28 @ 280KOHM"

"U7000/10 @ 3.46V
U7000/20 @ 4.69"
This also point to bad U7000.
Both should be close to 5V.

 

[ajdoc]

Bingo

R7005 had only 4V on pin 2.
Replaced and voltage is correct, got light on charger and fan spin

Many thanks for detailed help.

SOLVED