How can I chage my power adapter on the motherboard of my xps 15 9550?

thank you!!!

You can't go by "seems fine". Did you measure the voltage on the adapter connector? When unloaded (not plugged in) it should be somewhat higher than what is written on the adapter. If it is, and doesn't change when you move the wire around, the when yu open the computer up, carefully inspect for bad solder connections on around the connector b4 removing/replacing it.

@ruggb

Might be easier to use an Ohmmeter and measure between the input to the socket and the socket's output connections on the cable plug.

A lot of the time, the inner conductor breaks internally in the connector so the +ve leg is open circuit.

Cheers

@jayeff I didn't follow that? The "socket" is on the computer, the "plug" is on the cable. The socket's output connection would be on the PCB. If the connection is broken in the connector and the +ve leg is open then measuring voltage on the adapter connector (plug) would be the easiest. Or maybe I confused you with "adapter connector"?

@ruggb

if you click on the link in my answer above showing the power adapter port (HP's name for power port in laptop) you'll see there is a cable attached to the socket connector. It is not hard mounted on the board, it plugs into the board.

So connecting an Ohmmeter between the input side of the socket connector i.e. centre pin, and the red wires on the socket connector's cable plug and then between the outer ring of the socket connector and the black wires will prove continuity through the socket connector for both +ve and -ve leads.