I have a Presario 1722.
The screen loses its data and goes to a bright screen. Everything still works. My desktop is still up and if I was playing music it still plays.
I boot the computer down and then back up with the power button and it boots OK. I can hear the Windows XP 'song'.
If I give the bottom of the case a slap it wil lsometimes bring back the display.
Any ideas what this might be.
I have checked some ribbon cable connections and they seem ok.