I was asked to look at a set with three or four channels missing, blank screen and a red cross in corner, this was a Samsung. The digital tuning was greyed out yet tuned OK on analogue to no avail of course.... but when I did a installation tune it first tuned analogue then switched to digital halfway down the tuning scale...... duh!
Digital tuning was still greyed out, it was an oldish set and she didn't want to spend too much on it, one or two stations ITV4 was one she wanted was blank with no sound and a red cross in the corner.... either firmware or Eprom I thought, wouldn't even let me do re-set.
Dave