Solid amber light when power button pressed

This is my brothers laptop. He told me laptop was low charge and charger for some reason stopped working. He checked charger and it seemed fine. It then ran out of charge. I then held the power button for 20s and then replugged charger but nothing. I then held it down with charger and I noticed a solid amber light next to the charger port. Can someone tell me what the solid amber light means? I checked on different website and they seem to have different opinions on what it may be. The amber light also seems to appear when I lift the lid but that may just be fingerprint sensorr idk. Would be grateful if anyone could help.