Thanks again. I know that Lenovo would go with motherboard replace (I was considering it myself too, but the MB costs 70% of the price we paid for the notebook back in 2021), that's why I contacted the electronics service recommended by someone I know. I said exactly what the issue is and that probably EC is burned and they say that the diagnosis is free and the repair cost wouldn't go above $120, which I thing is a fair price that make this repair worth it.

I will update this thread when I get the notebook back. Maybe it will be useful for someone in the future....

I decided to go with a professional service. I'll update on what was the exact issue when I get the details.

I've spent some time trying to figure out what is the correct pinout on the DC jack and it seems that the signal one you mentioned is the middle one - see the image attached. I've also measured the power adapter plug and it definitely gives 19V on the side inner connectors, but not on the center one. Don't get me wrong, I'm not trying to correct you, I'm just trying to make sure that I didn't blow up the EC by using defective power connector.

So I'd say that the expected measurements on power connector are as follow:
1 - GND
2 - APDIN - 19V here
3 - N21106349 - the...

Thank you very much for your response. I just want to clarify a few points (this really shows my lack of experience and theoretical knowledge). Before installing the new socket, I plugged the charger into it and checked the voltages on the individual pins, but it did not occur to me to check where these voltages should actually appear – I simply did not assume the new port was faulty. According to the boardview, the power jack has the following pins:
1 - GND
2 - APDIN
3 - N21106349
4 - APDIN
5 - GND
6 - GND
7 - GND
In my measurements, there was...

Hi, I have a problem with a Lenovo IdeaPad Gaming 3 15ACH6 laptop. My nephew asked me to replace the charging port because the laptop wasn't charging. This issue had happened in the past, so I knew that replacing the port was only a matter of time. Until now, my nephew managed to deal with the problem using a temporary solution: bending the positive metal tabs inside the port with a thin tool. However, this had stopped helping for a while. Today, I replaced the port – and to my surprise, after the replacement, nothing happens when I plug in the charger: the power LED doesn't light up, the laptop...