-   Whenever I close the lid on the D510, the screen is blank when it is reopened and the only way I can get it to work again is to force the D510 to shutdown (by holding down the power button >10sec). I'm Running XP Pro-   Guest
You may check power settings in control panel and see if somehow the
settings for your screen are set to turn off or the power settings
program has been corrupted for some reasons.