Power Jack Short Circuiting

I've been having persistant problems with my Lenovo laptop's power jack.  Every once in awhile my laptop seems to short circuit the power supply I'm using.  Recently, the two panels which hold the power jack in place have also become loose. There's supposed to be a screw which holds the panels in place, but the inner screw thread is broken, and screws which I put in will fall out after a little while.

I've tried searching for what's wrong with the power jack but this doesn't seem to be a common problem.  What can I try to find out what's causing the short circuits, and what is the best way to keep the two panels attached?  Thank you in advance for any help provided.

 

my laptop seems to short circuit the power supply I'm using

I am not sure what you are trying to say; I am guessing that you don't really mean a "short circuit"; if an actual short developed in the circuitry, there would be sparks, smoke and possibly a popping noise. Also possibly damage to the motherboard or other components.

Do you mean that the laptop input jack from the wall adapter is loose and causes the laptop to make and break connection?  Is the laptop running normally other than that? Need details.