A vertical red line on the screen

Sir, my product name is HP Pavilion g6 Notebook pc and having 64 bit operating system. Sir, a vertical red line has appeared on the screen and it is seen when i start my laptop.A few days ago it was dissapeared but next day it again appears.Please help me to remove it.

Hello irohitgupta,
Thank you for posting on the HP Forums!
I understand your computer display is experiencing issues with a red line. I will do my best to assist you! To troubleshoot the issue, please refer to the relevant sections of this HP document: Display Quality Issues
The sections I would like you to refer to are "several colored vertical lines in the display", "screen is discolored" and "general troubleshooting tips for display quality issues". Please try all of the troubleshooting and let me know the results.
If the issue persists, please provide the following information:
1. The computer's model number. If you require assistance locating this information, please reference this website: Guide to finding your notebook product number
2. The computer's operating system. If you require assistance locating this information, please reference this website to determine your Windows operating system.
3. Does this occur on certain programs, or all programs?
4. Have you installed any new software or drivers on this computer, before the issue appeared?
Additionally, if the issue just began occurring, I would perform a system restore. I want you to bring the computer back to the earliest restore point possible, in an attempt to dodge whatever caused the issue. Here is a document on how to perform a System Restore: System Restore
Mario
I worked on behalf of HP.

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