You're speaking of the yellow tip on the end of the ac adapter.Take a real small precision flat head screwdriver,and see if you can gently lift it up of the pin of the charger port.Eye glass small little screwdrivers will work also..Just be careful not to bend it.If I remember correctly you can buy the charger port separate but involves taking the unit apart.It's just a small 2 pin plug in to the PCB itself.Best of luck to you...