Laptop isn't turning on neither charging

Hi, so I have this ASUS K501U laptop, that supposedly received liquid damage. Looking at the laptops insides, I could barely see liquid damage and even then not on the mainboard (both sides), only on the little board with LEDs at the bottom.

The issue is that laptop doesn't want to turn on neither charge (LEDs aren't lighting up and measuring with the multimeter doesn't show that it is charging on the battery, unless I measured wrong). I know the charger is good, because it does work fine on another laptop and I know the power jack is most likely fine because it receives full 19V without jumping around or etc.

I tried doing stuff like disconnecting the battery and holding the power button for about 30 s. but it did not help. What else I could try to revive this laptop or is it just a lost cause?