Enabling a disabled monitor

I accidentally disabled my hp pavilion dv4 2045dx monitor. I no longer receive any kind of image, nor does it appear in the list of displays. I connected my tv to currently have image. please help.
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More about enabling disabled monitor
  1. this page 14 chapter 2 http://h10032.www1.hp.com/ctg/Manual/c01597750.pdf also check the fn keys on page 13
  2. There's no button to switch on the internal button display. Again, whenever selecting another dispay using FN+8/windows key+P I get a black screen.
  3. I'm so sorry, I just realized I started 3 threads for the same issue. I disabled the driver for the display, currently the only image I have is from my tv connected through HDMI. My computer display no longer appears as a display.
  4. i would go to hp and reload all the driver they will suggest for that model and the os you use, i seen they also got a diagnostic app
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