Well the question with non-working power seats is always: "is it the switch, the fuse, the motor or the mechanics in the seat itself?"
You can check fuses pretty easy, so that's step 1. Step 2 would be to see if you have voltage going to the switch. If so, there's probably a power seat relay for Step 3 to check (a relay is just a heavy switch wired to a light-duty switch. The light duty switch trips the heavy switch, which then works the motor). If you hear no noise or clicks when you press the button, then it's probably electrical and not mechanical.