ahhh eclipse 1200za blinks on then off

eclipse 1200 za mono d block when ignition is turn turned on amp lights up on the top bar for a brief second then goes off. there is no diagnostic light that is labelled so i assume that is it. when ignition is turned off same thing occurs. it was working fine until the speaker box containing an l7 12" needed to be removed. wiring appears to be fine and connected properly. the website for eclipse offers absolutely no help. no manual. 350z 2005 rockford fostgate punch 400 eclipse 1200za capacitor then power to distribution block then to both amps grounded all to same spot no mistreatment that i am aware of other amp appears to be fine. help any suggestions?