Missing IC in U13 = exactly what you are getting: nothing.

That chip is called a "PAL chip" and in versions 7 and below governed feature capacities, networking, system size and also, if missing, prevented the system from fully operating. You can still sign into the system but you'll never get anything to work.

So when you see the "inconsistency" error, thats because the booting OS is looking for feature capacities (among other things), but the missing PAL chip can't respond.

60% of the time it works every time