White line on the screen

My iMac started showing a white vertical line on the desktop suddenly. I tried to change the users, safeboot. But, it didn't work out at all. Itried to drag it, but it didn't allow me to do so... Restarting, safebooting didn't work!
I have no clue at this stage.... I have gone through discussion forums, and realize there were couple of compliants resumbling the same.
Does any one know how to get rid of this problem?
Murthy
iMac4, 1   Mac OS X (10.4.7)   Intel Core Duo

Hello roshniculas,
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 there is a white line going across your screen, and I would be happy to assist you in this matter!
In accordance with this document on Resolving Problems with Notebook Displays, 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
In addition, did you get call back from the escalation team? 
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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