Sony Vaio pcg-7181m - martwy po zalaniu

Witam, laptop po zalaniu wodą, po zalaniu został natychmiast odłączony od zasilania i baterii i wysuszony. Niestety brak reakcji na przycisk power nie zapala sie żadna dioda, oraz nie pobiera prądu. znalazłem uszkodzony NPCE795LA0DX (wypalona dziurka w układzie) Wymieniony na nowy, płyta nadal martwa.
Płyta główna:
MBX-247 DA0HK1MB6E0 rev:E

Pomiary:
PQ3-
n6-19V
n5-11,4V
n4,3,2,1-0V
Q5- 0V
Q3 0V
PQ5-9V OK
PQ4- 0V na wszystkich (zwarcie między D-S )(S72,2N7002) Element sprawdzony nie posiada zwarcia zwarcie jest w układzie. EDIT: Pewnie dlatego, że po drugiej stronie płyty jest bezpiecznik F4.
U3- 0V na wszystkich.
NPCE- n108 0V (podpowiedź z innego tematu)
PL7-0V (13Ω do masy)
Po podniesieniu cewki nadal zwarte do masy są elementy: PC202, PC90, PC98, PC99
PL8-0V
PL10,11,12,13,14-0V
PD19-19V
PD2-4,66V
PD9-0,28V

PQ3-
n6-19V

PQ4- 0V na wszystkich (zwarcie między D-S )(S72,2N7002) Element sprawdzony nie posiada zwarcia zwarcie jest

Can not pin 6 PQ3 same voltage drain PQ4.
Measure the voltages on all pins of PD18.
Resistance to ground on the cathode of PD18.

PD18 475Ω from cathode to ground
0.42V on all pins and slowly goes down.

PQ3
n6,n3-19V
shorted to ground 1,2,4,5

PQ4 still 0V on all

PQ31
S 19,30V
D 0,23V
G 19,30V

Make a bridge between drain and source of PQ31.
To measure the supply current.
Measure the voltage on the cathode of PD18.

PD18-19,17V

Measure the supply current.

38mA and there is no any change when I push power button

I might add I don`t have service power supply, I just connected ammeter series with orginal DC adapter.

In blue tensions communicated in green correct voltage



Can not pin 6 PQ3 same voltage drain PQ4.

PQ3
p1 (ground) 0V
p2 0V
p3 0V
p4(ground) 0V
p5 11,4V
p6 0V -shorted to ground

PQ4
0V on all.

PU1
p1 0V (PGOOD)
p2 0V(ground)
p3 4,67V (VCC)
p4 0,41V (IN)
p5 0V (DLY ON)

PR4- (2,6k) 19,32in --0,4V out
PR14(113kΩ) 4,67 in--0V out

PQ5
p1 19,32V (1026Ω to ground)
p2 0V (shorted to ground)
p3 0V (shorted to ground)
p4 0V (Ground)
p5 0V (1204Ω)
p6 19,3V (1932Ω)

all with bridge between drain and source of PQ31.

PU1
p4 0,41V (IN)

Correct value 3v

PR4- (2,6k) 19,32in --0,4V out

Correct value 162k 19 -- 3v out

PQ3
p1 (ground) 0V
p2 0V
p3 0V
p4(ground) 0V
p5 11,4V
p6 0V -shorted to ground

PQ4
0V on all.

PU1
p1 0V (PGOOD)
p2 0V(ground)
p3 4,67V (VCC)
p4 0,41V (IN)
p5 0V (DLY ON)

PR4- (2,6k) 19,32in --0,4V out
PR14(113kΩ) 4,67 in--0V out

PQ5
p1 19,32V (1026Ω to ground)
p2 0V (shorted to ground)
p3 0V (shorted to ground)
p4 0V (Ground)
p5 0V (1204Ω)
p6 19,3V (1932Ω)

Re-measures without bridge on Pq31.

Measure the voltages on all pins of PU3, PU4, PU5, PQ13.

PQ3
1 0V
2 9,1V
3 9,1V
4 0V
5 0V
6 0V

PQ4
0V on all

PU1
1 0V
2 0V
3 4,65V
4 0,4V
5 0V

PQ5
1 19,32V
2 0V
3 0V
4 0V
5 0V
6 9,32V

PU3
1,2,3 - 0V
4,5 - 2,71V

PU4
1,2,3,4 - 0V
5-2,77V

PU5
1- 0V
2-2,77V
3-0V
4-2,77V
5-0

PQ13
0V on all

PQ31
G-19,32
D-0V
S-19,32

Should I repleace PR4?

PQ5
6 9,32V

PQ31
G-19,32

Is the same connection can not be different voltages

PU5
1- 0V
2-2,77V
3-0V
4-2,77V
5-0

Impossible. All pin 5 of PU3, PU4, PU5 must be at the same voltage.
All pin 4 of PU3, PU4, PU5 must be the opposite of the pin 2 (3v-> 0v or 0v -> 3v)
Recheck measurements to find the failed components.

Client took his laptop without repair. Thanks a lot, very helpful lesson.