Colored lines on laptop screen

i hav got hp pavilian g6 laptop (i3) with windows 8.whenever i switch it on it shows coloured vertical lines on the screen..and after a number of switch on off atempts it starts working totaly fine and then next time again when its switched on same problem occurs.plz tell kne if its a hardware or software issue. since my laptop is out of warranty i would like to kne approx what wil it cost to get damgaed part if any to be replaced?

Dear Customer,
Welcome and Thank you for posting your query on HP Support Forum
It looks like you are having issues with the Display of your Notebook. We will surely assist you with this issue
1. Please check if the Display/Screen of your Notebook shows lines even in BIOS or not
Note: Power ON the Notebook and keep tapping the F10 Key to access the BIOS
2. Please tilt the Screen/Display of the Notebook slowly towards back and the front side, check and verify
if the lines are seen at all the angles of the display
3. Please connect an external desktop monitor to your Notebook and check if the lines are shown even on the
external monitor
Please post back the results so I can guide you to the next procedure at the earliest
Hope this helps, for any further queries reply to the post and feel free to join us again
**Click the KUDOS star on left to say Thanks**
Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem.
Thank You,
K N R K
Although I am an HP employee, I am speaking for myself and not for HP

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"hello sir
i have hp g62 laptop 2 years old. i3 processor ,
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HP Notebook PCs - Entering Safe Mode (Windows 7)Hi , Welcome to the HP Forums!It is a superb place to find answers and suggestions!
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Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
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http://www.hp.com/cgi-bin/hpsupport/index.pl
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I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the right to say “Thanks” for helping!

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Good point. I fiddled with my friends laptop after I was convinced I could fix his Dell screen. Its still sitting in my room 2 years later. Thanks for the info.
i am in the same boat with my T30, T40, T42.... i decided to pull them apart and have yet to put them back again, i think i have lost some of the screws too.....
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The indication is that your monitor is at fault or the GPU on the logic board is bad.
First perform SMC reset and recheck,
Shut down the computer.
Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
Release all the keys and the power button at the same time.
Press the power button to turn on the computer.
After SMC reset, if same, contact Apple for service call for part replacement.

Colored lines on laptop screen

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