HP 255 G5 - DBL51 LA-D711P REV 1.0 - nie włącza się

Witam,
Model: HP 255 G5
MB: DBL51 LA-D711P REV 1.0
CPU: AMD 7110
BIOS:25Q64FVSIQ

Po podłączeniu laptopa pod ładowarkę miga dioda przy gnieździe zasilania. 3,3 V dostępne na gnieździe power.
Pobór prądu przy podłączonym zasilaczu pomiędzy : 0,019-0,022 A. Przy wciśnięciu przycisku brak wzrostu poboru prądu.
Dostałem też informacje, że wcześniej ktoś rozbierał laptopa ponieważ miała problem z ładowaniem i ktoś do wyciągniętej płyty głównej podłączył odwrotnie baterie główną;/

Napięcie na cewkach:
PL1 - 19,6 V
PL2 - 19,6 V
PL3 - 19,32 V
PL5 - 19,32 V
PL16 - 19,32 V
PL803 - 0V
PL804 - 0V
PL11 - 0 V
PL12 - 1.79 V
PL602 - 0.95V
PLM2 - 0V
PL8 - 5.07 V
PL7 - 3.37V


Rezystancja na cewkach:

PL1 - 492 kOhm
PL2 - 492 kOhm
PL3 - 11 Mohm
PL5 - 11 Mohm
PL16 - 7,5 Mohm
PL803 - 204 Ohm
PL804 - 30 Ohm
PL11 - 40 kOhm
PL12 - 5.7 kOhm
PL602 - 227 Ohm
PLM2 - 565 Ohm
PL8 - 18 kOhm
PL7 - 5.83 kOhm


Da się jeszcze uratować? Prośba o pomoc.

matic napisał(a):Measure the voltages to ground on pins 1, 4, 8 of transistors PQ4, PQ5, PQ6.

PQ4:
1 - 17,1 V
4 - 19,6 V
8 - 19,63 V

PQ5:
1 - 17,1 V
4 - 19,6 V
8 - 19,31 V

PQ6:
1 - 19,31 V
4 - 19,31 V
8 - 19,31 V

matic napisał(a):With these measurements the transistor PQ6 is damaged. Check it.

Yes, The transistor was damaged. After replace the measurements in PQ4 and PQ5 are:
1 - 19,6 V
4 - 25,6 V
8 - 19,6 V
Great! Motherboard is working with power supply.

but I still have problem with charging. After plug in the power battery start charging but only for few seconds. Power consumption grow up to 1,8A but only for fe seconds and next fall down to 0,017A. After few seconds again grow up the 1.8A.
This situation repeats.
The mesurments in battery socket. Only with battery:
1 - 15,58 V
2 - 15,58 V
3 - 3,27 V
4 - 3,27 V
5 - 0 V
6 - 0 V
7 - 0 V
8 - 0 V

The mesurments in battery socket. Only with power supply:

1 - 3,05 V
2 - 3,05 V
3 - 3,29 V
4 - 3,29 V
5 - 0 V
6 - 3,26 V
7 - 0 V
8 - 0 V

The mesurments in battery socket. power supply with battery:
1 - 16,7 V (after few second fall down to 15,60)
2 - 16,7 V (after few second fall down to 15,60)
3 - 3,26 V
4 - 3,26 V
5 - 0 V
6 - 0 V
7 - 0 V
8 - 0 V

PU1 was raplaced. Is the battery broken? But it was strange. The laptop turn on with this battery without power supply.
I see that in sytstem windows when the voltages on pin 1 and 2 fall down to 15,60 (power supply with battery) doesn't recognize the power supply.
When the voltage grow up to 16,7 power supply is recognize i battery is charging.

matic napisał(a):Measure the voltage on diode PD3, when the battery does not charge. PD3 is located near the WLAN connector.

Pin 1 -0 V
Pin 2 - 0,38 V

matic napisał(a):Measure the resistances to ground on both pins of diode PD3.

Pin 1 - 10 Kohm
Pin 2 - 0 Ohm

matic napisał(a):Are you sure that you didn't switch the pins 1, 2? If I'm not mistaken the pin 1 should be connected to the ground according to the pin numbers in the picture from post #9.

Yes, you are right.
Pin - 0 Ohm
Pin 2 - 10 Kohm

matic napisał(a):What kind of power supply have you connected to the board during voltage measurements in post #9?

The original power supply.

matic napisał(a):What is the rated power of this power supply?

I tried with two oryginal power suplly.
First 2,31 A 45W - in pin 1 = 0V; Pin 2 = 0,38v
Second: 3,33A 65W - in pin 1 = 0V; Pin 2 = 0,5V

For the both of power suply the same sytuation with chatging.

matic napisał(a):Also try with a 90W power supply.

Pin 2 - 0,98V, Still the same situation with charging