If it is in fact just the yellow light that won't turn off, all you need to do is turn the breaker off, and hold down the test button while turning not he breaker again, the yellow light will flash for a few seconds and then turn off, then let go of the test button.

Hi, I don't know if this has been solved or not, but anytime these G.F.I. breakers trip, it is for safety because it is picking up a voltage leak from what ever appliance has been plugged in. If it does not reset, it must be a older breaker and you will need to run down and pick up another one. Home Depot is a good place to get one for around $20. With it tripped, no voltage will be present. Just take a flat blade screw driver to remove the wire from the breaker. Depending on the type/style, most just hook opposite the screw side. Just grasp the breaker where the terminal screw is and give it a pull straight out to you. When you install new one, just hook the right side under the lip, and push left side in place and reconnect hot and neutral coiled wire. You will be set! Always be safe when working around any high voltage source. Please rate me on my help to you. Thank you!
Shastalaker7