Mine did the same thing. I had Rooter come out and they ripped me off big time. Charged me $800 for nothing. I complained and they came back out. I had them run the camera down the drain and found roots. They said they needed to rip up all the drains in and out of the house all the way to the road. I asked them to run the snake and they asked for $500. I told them to leave. I went to the Rental store and rented what they call an Electric Ell. For $40 I ran the snake and my drains were fine. I now buy copper sulfite and dump it down the drain to kill the roots. For $40, it might be the ticket. (When I brought the snake back out of the drain, there were roots all threw the cable.)