HP pavilion dv7-6c21nr blank screen

Please Help! My husbands Hp dv7 screen won't show up. The computer itself works just fine and I have been able to use the computer via the HDTV we have but I need his computer screen to start working again so I can do my quizzes and give the kids back the TV. The day before the computer was working fine and now the screen refuses to show up on the computer screen. I even downloaded and installed the new BIOS and it's still not working. I'm hoping we don't have to send his computer in to be fixed and there is quick solution to the problem

Hello jschronce,
I see that you are having display issues with your HP computer. I have a couple of suggestions that may help with the issue. Here is a link with troubleshooting steps to correct common display issues. Follow the steps in the link and it may correct the issue.
The first step I would suggest is testing to see if the screen stays blank when inside the BIOS. This would let you know if it is a hardware or software problem. 
Follow these steps to enter the BIOS of the computer.
Power the computer off
Power it on and immediately start tapping "F10"
This should open the BIOS utility on the computer
If you are unable to get this screen on the laptop display that means it is an issue with the screen itself. Since the computer is working on an external display the graphics card should be fine.
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