Mitsubishi 62525 no picture

alright, trying to diagnose what the problem is with this tv.  Up until yesterday i had the blinking green light issue.  I replaced the capacitors and now the tv no longer blinks.  it gives me a solid green status light, no others lit.  did the repair codes and it gives me 12 which means no problem.  Problem is it still wont give me a picture on the screen.  What should i be looking at next?  i was thinking maybe i didnt get a ribbon cable seated right when putting the dm board back in, but if that was the case wouldnt it throw an error or give me the blinking green light again?