make sure your graphics card is securely seated with no dust in its socket
if you physically remove your graphics to check the socket card restart your computer rinstall it this should activate found new hardware wizard
test all leads that attach to your hard drive including electrical extensions SATA
the leads from your ((motherboard to your hard drive)) Sata make sure they have a secure connections and are not faulty or just replace them they could be faulty make sure all leads that are attached to your drives dvd\cd have secure connections and are not faulty
even something as small as an electrical extension or a faulty fan lead can cause this problem
a computer needs all of the data and electrical current to travel through every working device and to have an end for a computer to be able work properly
if still no luck you could go for the extended desktop
you will need to connect the television to your computer with the vga lead attached to monitor connection
click start control panel display change display settings adjust resolution this may vary depending on your operating system you should a no 1 and a no 2 with detect and identify keep an eye on the screen when you select the number tabs this may vary depending on your operating system
when you select the no 2 tab this should be the extended desktop always click apply after making any changes or click start control panel administration tools computer management device manager scroll to monitors right click select scan for hardware changes
if the extended desktop works your lcd screen may be faulty hope this helps you
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