Weird graphics error: 50% of lines are invisible on 1440p LCD

[monstercolorfun]

I received an LCD today by DHL( HPz27n ). At native resolution of 1440p. I've tried all resolutions and ClearType and DPI options and CMT DMT GTF custom resolutions in Windows and AMD configs for a couple of hours.

Using windows paint, when i draw an oblique line, 1/3 of the vertical lines are absent. All of windows 7 has the same problem. The fonts are blurry. Running AMD 7850 graphics card and latest drivers, DVI to DVI digital cable.

 

[Jwpanz]

You may just need to change the resolution through your display settings to 1440p. It may be running at 1080p and stretching the screen image to fit 1440p.

 

[monstercolorfun]

The screen and writing are ok at 1080p, that's how I have it now. When I switch to 1440p is when the errors happen. With 1080p it's good. It's as if 1440p was happening on the monitor and not on the AMD input? I don't know why the 1440p of the card and LCD are a different arrangement vertically and horizontally it's fine.

 

[Jwpanz]

Do you have another cable to use like HDMI or DisplayPort?

 

[monstercolorfun]

I don't, I'm going to have to find one. I' ll see with a friend, I have HDMI someplace.
These are supposed to be the same pencil:

 

[Jwpanz]

My guess is the DVI port or cable is not functioning properly. Either that or it’s a driver issue.

 

[monstercolorfun]

Yes you are correct, An HDMI cable has awesome rendition on the monitor and the DVI works fine for 1900x1200 and didnt work for the current monitor.

 

[Jwpanz]

Cool! I’m glad to hear it works now. Make sure to choose a solution so others with the same issue can use this thread as a resource.