When I start it, the fan works for a second and then shuts down. Then after a couple of minutes or seconds (it's shortening) the computer shuts off (at that moment the fan works again for a millisecond).
I already cleaned all components and also the thermal paste. Didn't work.
I should also say that I'm using a different charger (using: 20V 3.25A / original: 19V 3.42A). But the same happens when I'm using its battery, so I don't think this is the issue.
I appreciate your help.