How do i stop my screen from rolling/flickering?

[acallys]

Hi there. I'm using an ATI Radeon HD 4600 Series graphics card, and when I'm connected to my computer screen I get a minute rolling effect on my screen. I've tried changing the refresh rate and it didn't do anything. I recently connected it up to my new 40" LED TV and it was a lot worse with big white rolling lines. If anyone could help that would be awesome! Thanks!

 

[4745454b]

What monitors are you using? How are you connecting them? Any chance anything might be broken? (meaning used.)

 

[acallys]

I'm using a BENQ G900W LCD Monitor connected via VGA cable. I only used the VGA to connect it to the TV, didn't try the HDMi cable as of yet. I don't think anything is broken. I tried a different VGA cable but I'm not at my flat at the moment (with the TV) to try that out.

 

[acallys]

Has anyone got any tips?

 

[Mousemonkey]

Yes, don't bump your thread.

 

[Tamz_msc]

If you have a different connector, then try it( like if you're using DVI, try HDMI).