MSI GT72s 6QE Dominator Pro G AC/battery problem

[Graliz]

Hello guys. I have an annoying problem with my laptop. It is 4 months old.. And it stopped using AC adapter when plugged and instead it uses battery power, so when I play games it discharges and when I stop playing it charges back to.. Before this problem, laptop always used AC when plugged and it showed like "plugged in not charging" now it just shows that it is charging all the time. What could be the problem?
PS. Just found some more stuff.. When AC is plugged, battery shows 99%, when I unplug AC adapter, it starts showing 100%. plug it back and 99% again.. The hell is going on.. I'm sad. Laptop is new and expensive...
PSS. AC adapters plug that goes into laptop gets very hot..

 

[webworkings]

Normally I would suggest things to try, however if the laptop is that new, and the plug/port are getting hot, you need to contact the manufacturer. The device should still be under warranty, and then then can either repair or replace it for you.