First, test that the speakers work. Unplug them from the amp and get a AA battery, and press the negative wire to the negative (flat bottom) of the battery and brush positive wire to positive (nub) of the battery, you should get a pop sound and the woofer should move.
Secone, make sure you are using the right input selection and your inputs are in the correct input slot.
Secone, make sure you are using the right input selection and your inputs are in the correct input slot.