power supply jack loose – wont charge – losing power

My power jack on the inside of my CQ62 is loose and is not charging the battery when chord is plugged in. The light indicator comes on for a second and then goes off as screen gets dark, etc. I’ve read some fixes about soldering the pin and there are some ‘how-to’ videos on youtube BUT I’ve also heard a few people say they took their system into “Computer ER” who fixed it for only $30. Is this true? I ask because other people have said it will cost more than a new laptop to fix. Who do I believe? And is there any other options or causes what the problem may be? Thanks for your help and time!!