Kicker zx 1000.1 green light flickers and no sound

The first thing I would suggest is to check all connections to the amp and speakers, especially the ground. A loose ground can cause the problem listed. You can test this by temporarly running a ground from the amp to the battery neg. . If the amp fires up ok then that means your grounding point for the amp should be checked and cleaned and reattached firmly. If you have a meter(multitester) set it to ohms and check the impedances of the voice coils in the woofers. If one is cooked it may be shorted and tripping the amps protection. Always hook thing up with the sys off and then turn on and test.