19" ibm crt monitor - horizontal scan lines

[dfra]

Good morning,

Does anybody know what could cause slow moving horizontal scan lines to move
from the bottom to the top of the screen ?

Thank-you in advance.

 

[Noozer]

Good morning,

Does anybody know what could cause slow moving horizontal scan lines to
move from the bottom to the top of the screen ?

Fluorescent lighting in the same room. Change your refresh rate.