I have a tube that works fine horizontally, but, as expected, the colors distort when I make it vertical (as it is for a cocktail cabinet). I have read the following fixes:
1) Do nothing and let it adjust itself via built in degaussing on the tube
2) Perform a manual degauss with the appropriate tool to correct the issue
3) Have the tube's yoke, etc., readjusted for vertical orientation.
Tell me - which is true? It's a WG U3100, btw.
TDD