hp zx5180us – external power supply connection problems

My HP zx5180us works fine, but I frequently have problems getting my external power cords to maintain a connection. The internal connector seems fine, but it appears that the connection is “loose”. If I hold the connect to the side in any direction, the connection usually works. But if I release the connector, the connection is frequently lost.

I have checked and it appears that both the car & 110 connectors are the correct size.

Any suggestions?