Acer Aspire 3 A315-23G Quanta Z8E DA0Z8EMB8C0 nie włącza się

Witam,
laptop jak w tytule, po wyrwaniu wtyczki z gniazda zasilania przestał się uruchamiać. Napięcie na płycie głównej znika za PQ3 czyli za pierwszym tranzystorem. Po podaniu 19V za tym tranzystorem na PR12 laptop uruchamia się i pracuje prawidłowo. Tranzystory nie wykazywały zwarcia, wymieniłem je na inne (AONS32306 wymieniłem na MDU2657), jednak nie zmieniło to zachowania laptopa. Na drenie PQ3 jest 19V, na bramce i źródle 0V. PC6 i PC8 nie są przebite, a następny za nimi jest charger, czy wymienić go?
PR247 oraz PR248 sprawne.
Laptop nie ładuje baterii, napięcie na baterii to 0V, mogła ulec uszkodzeniu na skutek tego zdarzenia lub na skutek długiego leżenia laptopa po awarii.
Pozdrawiam, załączam fragment schematu z obwodem chargera.

Measure voltages on pin 3, 4, 5, 6, 11, 12, 18, 20, 24, 25, 28 of PU12.

Machine napisał(a):Measure voltages on pin 3, 4, 5, 6, 11, 12, 18, 20, 24, 25, 28 of PU12.

pin3 - 0V
pin4 - 0V
pin5 - 0V
pin6 - 0V
pin11 - 0V
pin12 - 0V
pin18- 0V
pin20 -0V
pin24 - 0v
pin25 - 0V
pin28 - 20V

Check PR24=866K, PR246=137K.

PR245 -869 KOhm
PR246 - 129 KOHm

Measure the tensions on all the pins of PR245.
Are you sure you have correctly counted PU12 pins?

Yes, I counted pins well.
On PR245 is 0V on both sides to ground.

The copper trace highlighted in red (picture below) is broken. Repair it with a jump wire.

matic napisał(a):The copper trace highlighted in red (picture below) is broken. Repair it with a jump wire.
[ Obrazek ]

I repaired this cooper, now it is 20V on one of pins of PR245. No voltage on second pin, no voltageo on both pin PR246.

Try if the connection with the PR245 and PR246 is present.
If the junction between PR255 and PR246 with PU12 pin 6 is the connection. And if the other side of PR246 is connected with the mass.
If the connections are present and do not detect voltage on PU12 pin 6 you have any open resistance.

Connection between PR245 and PR246 is correct.
Connection PR246 with pin 6 of PU12 is correct.
PR255 is short pad on motherboard, it isn't connected to pin 6, only to pin 12 of PU12. Is it correct? I think so.
PR246 is connected to ground also so it is okay.
Isn't it problem with PU12?

Look at the attached diagram to response 8 as are the connections to Pin 6 of PU12.

For diagnostic purposes I replaced BQ24780S and still 0V on ACDET. Do you have any ideas?
In this case can I do jumper from power socket to PR12, disconnect broken battery and end this repair?

You must restore the links if you interrupted to PIN 6. You cannot feed directly to PR12 because you wouldn't have protection to short or other damage.

Links to pin6 are good, resistors are good to (maybe 1-2kohm difference to schematic value).

Measure the resistance to the mass on pin 6 of PU12.
If it is low, replace PU12.

It is high, 126KOhm.

Removes the voltage on PIN 6.
Help yourself with the image to count the pins. Image view from above.

Remove the transistor PQ3 and charger chip PU12 from the board.
Remeasure the voltages to ground on both pins of resistor PR245. If there is still no voltage on second pin of this resistor, replace the resistor PR245 (866kΩ/1%, package 0402).

matic napisał(a):Remove the transistor PQ3 and charger chip PU12 from the board.
Remeasure the voltages to ground on both pins of resistor PR245. If there is still no voltage on second pin of this resistor, replace the resistor PR245 (866kΩ/1%, package 0402).

I removed PQ3 and PU12, there is voltage only on one of two pins. I replaced PR245 to new one and still there is no voltage. What else can I do?