I have a HP Pavilion DV4 2104US Notebook. When the moitor is open all the way the screen goes black. When the monitor is open 1/4 of the way it works fine. I hooked the notebook up using its VGA port to another monitor and it works just fine, that was with me opening and closing the montior all the way. So , this tells me that the problem is with the display section of the notebook. Opened up the noebook last night and checked the display cable, and inverter for any loose connections and found none. Any suggestions ?