2010 Mac Pro OSX 10.6.8 Screens Randomly Turn Off, Wont Come Back On

My work computer has been having this issue for some time now. A few times a day my screens will just go black, the power lights on them will stay on, but nothing will show up on the screens, causing me to force restart my machine and lose progress on whatever I was working on. The tower is still running when it happens, and if I am listening to music it will still play for a little while, but the screens will never come back on.
When I force shut down my machine, it will take a few minutes before I can restart it. The tower will turn on, the chime will sometimes sound, other times wont, and the screens still remain black.. After a while it will boot up like normal again.
I've tried resetting the PRAM and some other things, but I really dont know what is happening or how to fix it. I run duel screens, and they both just shut off, could they be the problem? why would both turn off if they are?
Any help would be great.
Thanks,
Drew

Could be that your graphics card is overheating. It might be clogged with dust and needs cleaning.

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Hello @Jalen_Rahter,
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 understand that your notebook computer randomly powers off to a black screen. Does this happen when the AC adapter is plugged in? Does this issue occur in Safe Mode? I would be happy to help you, but first I would encourage you to post your product number for your computer. Below is a is an HP Support document that will demonstrate how to find your computer's product number. In addition, it will also help if you indicate which operating system you are using; and whether your operating system is 32 or 64 bit. The more information you can provide, the better!
How Do I Find My Model Number or Product Number?
Which Windows operating system am I running?
Is the Windows Version on My Computer 32-bit or 64-bit?
Please re-post with the necessary information, this way I will be able to research this further for you. I look forward to your reply!
Cheers!
MechPilot
I work on behalf of HP
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According to this article, your EFI firmware is up to date:
Computer
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2010 Mac Pro OSX 10.6.8 Screens Randomly Turn Off, Wont Come Back On

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