only starts up in safe mode
if started up normally, it chimes, the screen comes on with the apple and the spinning wheel. then it goes into a blank blue screen.
However if the shift (safe start-up)key is held down, then it works reasonably, but no sound.
I have done this now,
but 11 items still remain,
repeated many times, and permutations,
still would not repair.
I even found the offending files and replaced them with copies from a working mac, didn't work.
I have photos of the screen, which I have posted on my g-mail account;