i think the major problem is the "immediate stop", if we properly analyze this symptom we can get the solution. when we plug the AC/DC adapter to the laptop, it shuts down; so there are two major causes:
- OVP protection problem (Over voltage protection)
the 19V of the adapter is not properly regulated; we need to replace te AC/AC adaptor
2. OCP protection problem (Over current protection)
if the power jack is broken, it cause a bad metal to metal contact, in this case the transient current increase fastly, the power managment IC go to the standby mode; to protect all other device ( cpu, memory, graphic controller etc) , only two voltage are present: 3.3V always on and 5V always on, we can charge the battery. to solve the problem, we need to replace the power jack located on the laptop motherboard. here the picture of the power jack: