I have a Philips 50PF9630A Plasma TV and I am trying to use it as my monitor for my computer. I am having trouble getting the computer to use the entire display. It currently stretches the length of the TV but there is unused space height wise. I am using a DVI to HDMI cable to connect the computer to the TV. I have got this to work before by using a program to adjust the display settings of my computer but I can not find that program or know which settings to choose. Any ideas?