Yamaha MG06X 6 Input Stereo Mixer with 2 AxcessAbles 20ft XLR-XLR Cables

I have to give 0 star right now. The mic is only work a while. I use the 2 cables to Shure SM58S to connect the mixer. It only worked a few minutes. I hear my voice though receiver and the speakers. When I shutdown everything and finish setup TV box and receiver. The mics refuse to work. The mic peak never light again. I tried to turn and push all the button, no effect. The line 3, 4, 5, 6 and output are ok. I can hear the music though the mixer, but the 2 mic lines not work. I don't know why.