|Shine a bright light on the Screen, if you can see the Desktop Image the Computer is Booting OK but the Back Light or Inverter, or Both have failed. |
Contact HP/Compaq for problems associated with your Model #. I seem to recal a video issue with the 6000 series LTs. Of course my memory could be faulty but it won't hurt to check.
There is nothing to learn from someone who already agrees with you.