On Wed, 4 Dec 2013, Christian Corti wrote:
  The box was an imagination, but otherwise:
 "I am getting a very dim image even though the CRT itself appears to be in
 very good shape with no burn-in and otherwise crisp display.  I think I've
 got a high-voltage problem[...]"
 is in contradiction to this:
 "In this case, the CRT also had a large amount of burn-in so was highly
 suspecious due to that alone. " 
One statement was after the other.  But usually, burn-in takes longer than
that.