My 2014 MacBook Pro has a line across the screen when minimizing

I am having a problem with my 2014 MacBook Pro with the 2.7 Ghz i5 and 8Gb ram.
When I minimize my screen, irrespective of the program, a white line appears across the desktop and sometimes blinks or stays, then goes away. It does not happen every time...However, I already returned one 2014 MacBook Pro for this issue and now it seems this computer is doing it too. I am running Mavericks 10.9 and to make sure it wasn't anything that I had on the original computer, I did not do a backup from time machine; I reloaded the programs from scratch. I have never had this problem with my macbook air and I have a video of the issue occurring.
Does anyone else have this problem?
Thanks!

I don't think this is going to do the trick, because the iPad hardware has probably been damaged - but did you try rebooting the iPad?
Reboot the iPad by holding down on the sleep and home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider - let go of the buttons.
You can see your replacement options and cost here.
http://support.apple.com/kb/index?page=servicefaq&geo=United_States&product=ipad

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Issues with lines across the screen, as well as freezing

Issues with lines across the screen, as well as freezing
Hello all
Got an iMac since January 2008 and I do like it a lot, even though it has some issues:
-- It displays (quite often) lines partially across the screen
-- Lines appear as well when opening applications or when menus come up
-- The system freezes more than I like to admit (more than my Windows/Ubuntu box)
I don't know if the freezing has to do with the lines that are shown on my screen. But I assume that both issues relate to some video card problem. I can't be sure - but that's what I assume from living with this issue day to day.
The line on the desktop (most of the time it is there before login) I can always get rid of by changing the display resolution to something else and then changing it back. Normally the line is gone, or, reappears on a different spot on the desktop. But repeating the procedure removes the line.
However, this does not mean that the lines are not showing up again when launching apps or displaying menus!
And since those lines appear to happen randomly, I think it's safe to assume that we're not talking dead pixels here, either...
About the freezing:
My iMac freezes sometimes when I move the mouse around, when switching desktops using "spaces" or when the zoom function of the Dock kicks in. Sometimes the screen goes completely black, sometimes completely white. The mouse, however, always works. But the system requires a reboot.
Again, this happens too often to feel comfy about it.
With my little knowledge of Mac troubleshooting I assume that there's something wrong with the ATI card that's built into my Mac. On the other hand, some people say that they started getting similar issues after updating their OS to Leopard. Again other people say that such issues stem from an ATI revision that is too old and the Mac should get a new ATI card. And how would that work? Isn't that an "all-in-one" machine with everything soldered onto the mainboard?
So, any help in this matter is greatly appreciated...
Cheers,
Rainer

Here are a few screen photos I've taken (not screenshots, as the lines are not visible when taking screenshots. I used my digicam to snap those...).
Here's the link to those screen photos displaying some of the many lines I keep having:
http://picasaweb.google.com/rainer.rohde/NewAlbum62508115AM
Needless to say, as I typed this message here, I had a nice line going across my Safari window..
Cheers,
Rainer

My 2014 MacBook Pro has a line across the screen when minimizing

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