White horizontal lines across the bottom of Macbook display

Shortly after I turned on my Macbook last night, the bottom of the screen started to flicker and solid white lines appeared across the bottom of my screen. They go up roughly a couple inches from the bottom, and fade towards the right of the display.
When I restart my computer, They reappear as macosx is loading.
When I mouse over these white lines, the cursor is unaffected, yet they dont appear when I screenshot.
I've gone back through all the discussions but couldnt find any solutions =S
Ideas?

I think you may find hope with this article:
http://docs.info.apple.com/article.html?artnum=303319
The effect is rare but not unknown. Unless it's a hardware issue, you might be able to use this fix.

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It may be a GPU or display issue. In both cases, make a backup of your Mac and take it to an Apple Store or reseller to get it repaired.
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Hello again javajohn23,
I would like you to try the following steps:
Step 1. Turn off the computer, and then remove the power cord
Step 2. With the power cord disconnected, press and hold the power button for five seconds
Step 3. Reconnect the power cord, and then turn on the computer
If the above steps do not resolve it try the next set up steps:
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Step 2. Repeatedly press the F10 key about once every second for five seconds after turning the computer on
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Step 5. Press the Enter key. This accepts the changes
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Another thing I can think to try is review the HP Support document: Changing Display Settings, Background Image, Icons, and Screen Saver (Windows 7) to see if you can identify anything out of place.
We can also try to reload the Intel Graphics Driver for your computer as it will wipe out the settings when the new driver is reinstalled.
Please re-post with the results of these steps. Thank you for posting on the HP Forums. Have a great day!
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Check out the article below for troubleshooting your issue with the display. There are a few things that can be done, like changing the resolution of the display and also to reset the NVRAM to see if that resolves that for you.
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http://support.apple.com/kb/ht1573
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Welcome to Apple Support Communities
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White horizontal lines across the bottom of Macbook display

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