XPS 9500 boot and charging issues

Hi, I have a Dell Laptop XPS 9500 purchased in 2021.

Recently, my laptop started doing the following things:

1. Stopped charging with the original Dell charger and notified to use the “original adapter”.. I am. Sometimes when I plug it in before booting, it does charge. Sometimes when I plug it in after using on battery for 15+ mins it does charge. So, the charger is NOT the problem.
2. I replaced the battery as it seemed that could cause a lot of problems. As it sometimes would just shut down when on half battery. But there’s no change in the booting issue. So, the battery is NOT the problem.
3. Whenever I boot up the laptop it either 1. Restarts and says there was an issue with Windows so you can reboot or go to other settings (it’s a blue screen). It always restarts though. I never got stuck on a black or frozen screen. 2. It works fine.

Today, when booting up, it now only shows the Dell logo on a black background, I hear the fan, caps lock light is on and the charging light is on. No other beeping or lights. But then it just turns off.. This is withouth the charger.

With the charger plugged in before booting, it starts fine.

I do not understand what’s going on. I feel like it could be several things. And I’m not a big fan of reformatting and then for example discovering I need a new motherboard or something.

Please help.