Vertical rainbow lines

[Pjaska]

Yes, i think its somekind of reflection inside crt. I think i now get the logic when this lines happen, in smb3 level goal the overscan area is blue = lines appear, inside the tube or castles overscan area is black = no lines. Also the goonies game intro screen has orange overscan area and lines appear but in game black overscan and no lines. And there was some other games too but i cant now remember.

Good thing is that they are feint, camera shows them worse than they are. Second thing its not very frequent.

Brightness and contrast have very little effect on it, if i turn brightness way up then lines and whole screen will get gray and if i turn it down then lines will dissapear when screen goes very dark.

Squirrel, i would love to post picture of the tilting the yoke but i didnt take photo of it when i was messing with it. and it was big job to get the yoke in the right place where i could adjust the purity and converges so that they are both ok. I rather not move it now. Sorry.