I replaced my original adapter with another one when the original cable wore significantly. I have had the replacement for 2 years and in the last few months I have had to adjust the cable and the plug, wiggling it to make contact and go from a "yellow/orange" to "green" signal from the internal battery. But today it won't go past the "yellow/orange" color and shuts down due to low battery. I thought right away that I should replace the ac adapter, but perhaps it is the computer plug. How do I tell? No amount of holding the plug with my hand, wiggling it, adjusting it changes anything, except when I dampen it with saliva, and then insert the plug, the green will come on for a few seconds longer. It seems that contact is being interrupted in someway. Any thoughts?