Blinking the line in the screen monitor

Appear two lines  parallel blinking in the screen of many color  may yellow, green, blue and others. in the left side.
HP ENVY dv4 Windows 8 64bit.
We need your help about this.
thanks,EJ

Hello EJ1960,
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.
I have read your post on how your notebook screen is displaying colorful lines across your screen, and I would be happy to assist you in this matter!
To further diagnose this issue, I recommend plugging in your notebook to a TV or monitor. This will help determine if there is a defect with the graphics card or the LCD display.
In accordance with this document on Resolving Problems with Notebook Displays, if the screen does not display the same colored lines on the monitor as it does on the notebook, it means the defect lies in the notebook screen itself.
If this is the case, I recommend contacting our technical support at 1-800-474-6836. If you live outside the US/Canada Region please click the link below to get the support number for your region.
http://www.hp.com/cgi-bin/hpsupport/index.pl
I hope this helps!
Regards
MechPilot
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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