Screen fault

[JohnH]

I am not very technical and currently from startup my computor screen has a
series of lines filling the screen. Ocaisionally the colour changes from
normal to a greenish, then after a while it reverts to normal. Any ideas
please.

 

[Leonard Grey]

If removing and reinstalling the video driver does not fix the problem
then one (or more) of your video card, monitor cable or monitor needs to
be replaced.