As taskmaster said, a pin burnout is usually from where the connection cannot handle the current going through it so gets hot. This is either caused by a bad connection (check motherboard soldering), a short (mabe some conductive debris got in there?) or the power supply was not regulating properly and over juicing it (possible if its not a native adaptor)
Either way, i would certainly take the laptop apart and check the motherboard & power components as any sign of burn is not good and could potentially cause a fire if left unfixed. Its also worth buying a proper laptop PSU as these should be properly regulated.
Either way, i would certainly take the laptop apart and check the motherboard & power components as any sign of burn is not good and could potentially cause a fire if left unfixed. Its also worth buying a proper laptop PSU as these should be properly regulated.