vertical lines in a Toshiba TV

[Alex KL-1]

To be fair, sometimes I seen (and have) some sets with some artifact. I have one Toshiba with horrible black clamping and inomogeneous near black screen. But is not much the near black artifact, and is easy to dismiss it, unless someone are playing a proper bright/cutoff adjusted Resident Evil game (even the ones from Playstation 1)... but I not dismiss it's black level unstability (very sensitive to contrast; it can be a strong CRT currrent limiting or suchlike). I did NOT solve it, since I'm using it now only for the Atari (then is indirectly solved due to usage ;-)