My LCD screen has three noticeable problems. Note that when I plug an external LCD tv into my laptop, the picture that the LCD TV displays the screen is fine.
As seen in: http://ubuntuone.com/5Mf2cNq14NeprqlcRG1Pce
The first and most noticeable and frequent problem is white lines that go horizontally along the LCD screen. When I touch the monitor or adjust the angle, some of the white lines appear while other white lines disappear or flicker.
Here is a picture: http://ubuntuone.com/6jqkeHiRnAwijI8LJLPfuL
The second problem, much smaller, is the little colored lines, usually just one or two, that go up and down the screen. You can see one vertical blue line in the picture. The last thing is a glowing, rectangle-with-rounded-edges shaped halo that sometimes appears on the screen with the white lines.
The halo looks like this: http://ubuntuone.com/44rfw1scomcHl0aOZdxpV6
The middle 1/3 of the glowing halo is missing, but as you can see, the entire halo would block pretty much the entire screen. It usually appears to be shining forth from behind the white lines. Last thing: replacing the display cable that connects the LCD to the motherboard made absolutely no difference. Same screen problems before and after I replaced the cable. That's all.
So, do you know what's up with my hp dv4-2170us laptop?