Hi @rubibean ,
You most probably need to replace the DC-In power connector.
You are fortunate as it is a plug in module, no soldering required.
Here is a link to the PC maintenance and service guide for your laptop, taken from this link
Scroll to p.66 to view the necessary pre-requisite steps and then the procedure to remove the power connector. To install the replacement part, simply reverse the procedures.
Here is the HP part number for the connector, 813945-001
Here is a link to suppliers of the part.
It is not a recommendation to use any of them. It is shown just to give an idea of the cost of the part. There may be other suppliers that suit you better.
Just search online using the part number only in the search box to get results.
Hopefully this is of some help.