Lines on the display screen

I have started to get black lines flashing across the screen vertically. It doesn't happen all the time, and it's about 2 inches in from each side. Any ideas as to why? Is this a sign of pending problems?

Hi @Zohab ,
To get your issue more exposure I would suggest posting it in the commercial forums since this is a commercial product. You can do this at Commercial Forums.
Even though this is a Commercial product,Try performing a hard reset.
When performing a hard reset please note remove any and all USB devices. Disconnect all non-essential devices.
Here is a link to the HP Support Assistant. Just download and run the application and it will help with the software and drivers on your system. If things are not up to date you could see flickering.
Here is a link to computer won't start Windows 8 and Windows 7.
F2 will give you options to do some Diagnostics.
If nothing here works for you, please call our technical support at 800-474-6836. If you live outside the US/Canada Region, please click the link to get the support number for your region. They will be happy to assist you immediately.
Thanks.
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 bottom to say “Thanks” for helping!

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