ASUS ROG GX502LXS-HF049T - nie włącza się wogóle - NAGRODA 100PLN!

Witam, mam problem z laptopem ASUS ROG, sam padł płyta główna, brak światła LED. Nie włącza się w ogóle. Zasilacz i bateria jest ok.

Model: ASUS GX502LXS-HF049T
Płyta główna: GX502LXS r2.1
CPU: Intel Core i7-10875H
GPU: GeForce RTX 2080S Max-Q 8GB
Bateria i zasilacz oryginalne.

Mam sprzęt zasilacz lab, miernik, seek thermal compact pro, lutownica.

Nie wiem gdzie szukać problemu, dopiero się uczę. Nie chcę dać go do serwisu, chcę sam naprawić.

Nagroda 100zł.

Proszę zmierzyć napięcia do masy na wszystkich cewkach przetwornic (podłączony tylko zasilacz, bez baterii) oraz podać prąd, jaki pobiera płyta po podłączeniu zasilania i po próbie włączenia. Proszę także sprawdzić, jakie jest napięcie do masy na samym włączniku. Rezystancje na cewkach wyglądają w porządku.

Pomiary napięcie na cewkach:

napięcie do masy na samym włączniku

- chodzi o przycisk button? Sorry nie bardzo rozumiem

vlol написав:Sorry nie bardzo rozumiem

I meant the power button. If Polish language is not your primary language, feel free to write in your native language. We can easily communicate this way as well.

Yes, I would prefer to communicate in English, as it is much easier for me. Thank you very much!

Measure the voltage to ground on power button in 3 steps: power supply connected, power button pressed, power button released. Please also measure the voltages to ground on pins 3, 6, 9, 12, 13, 17 and 20 of PU8701 chip (power supply connected, motherboard in stand-by mode).

pins
3 - 0.000V
6 - 0.000V
9 - 0.000V
12 - 0.001V
13 - 0.000V
17 - 0.000V
20 - 0.000V

Vogelek23 написав:Measure the voltage to ground on power button in 3 steps: power supply connected, power button pressed, power button released.

What about that?

Measure the voltages on all pins of PQ8901, PQ8902.

Hi, I am very sorry for not replying for such a long time. I have been really busy.

Vogelek23 написав:Measure the voltage to ground on power button in 3 steps: power supply connected, power button pressed, power button released.

Yes, I have measured and obtained a reading of 0.000V.

Machine написав:Measure the voltages on all pins of PQ8901, PQ8902.

photo:

Measure the voltages to ground on pins 4, 5, 6, 11, 12, 24, 25 and 28 of charger chip PU8900 (SN2867RUYR) with only power supply connected (battery should be disconnected).

Sorry, I cannot find the charger chip PU8900. Can you show me where it should be?

Here you are.

PU8900 pins:
4 - 0.018V
5 - 0.002V
6 - 1.726V
11 - 0.000V
12 - 0.000V
24 - 6.04V
25 - 5.86V
28 - 20.60V

Please measure the voltages to ground on all pins of PQ9001 double MOSFET. Same conditions as before. PQ9001 location and pin direction as follows:

PQ9001 pins:
1 - 0.000V
2 - 6.03V
3 - 1.721V
4 - 0.000V
5 - 0.000V
6 - 0.000V

Please delosder PQ9001 and repeat voltage measurement on pin 6 of PU8900 (charger chip). Same conditions.

PS. Please do not quote entire post visible above as it does not make any sense in case of replying to a single post. Quotes (especially selective) are more appropriate if you reply to a multiple posts or multiple measurement requests.

Delsoldered PQ9001.

Pin 6 of PU8900 - 1.727V

Please do not solder PQ9001 back yet, but measure the voltages to ground on each pin of two resistors: PR8904 and PR8905. Same conditions as before. Location and pin number are as follows.

PR8904
1 - 20.85V
2 - 1.727V

PR8905
1 - 1.727V
2 - 0.000V