LG-P690/P690f earphone/headset sign problem solution

This post is a solution for the headset or earphone sign even without plugging a headset on the phone model LG-P690 variants P699/P690f known as LG optimus net, optimus spirit or optimus link.
The problem usually occurs on water damage unit.
Here is a sample pic.

And here's the simple jumper solution, it is tested and is 101% working..