If ILS is working correctly then you would get LOC and G/S pointers as normal.
If you then had NCD (non computed data) the LOC and G/S pointers would be removed and freq/ident would be removed but still have the deviation scale.
If you had invalid data the pointers and scale would be removed and you would have a flag, freq/ident would be removed.
And status msg's.
If the input had failed you would get something like the above.
If you lost the Display controller then I would guess that you wouldn't get the flags displayed?
Does that sound about right or not??
As said a bit of an ambiguous question!