Where exactly are the black and white wires located? Generally, there are no wires hanging out from the computer. The Latitude D600 User Guide on Dell Support website has documentation which may help answer your queries.

Before you try reinstalling the OS, it might be helpful to do a little troubleshooting to determine if this is a hardware or software problem. Reinstalling Windows means you'll lose all your data on the hard drive, unless it's backed up on external media first.

I have a vostro 430 which I haven't used for about 3 months and today when I turned it on the screen kept saying no dvi-d connection while I had the blue connection on can someone help