Please help me... yesterday I opened my computer. It worked normally,but today I opened it the screen said'No Signal'.... please I need a solution other than something inside the hardisk becuase its closed from outside... and Thanks
Try a new VGA cable from monitor to the back panel of your computer.
If that makes no difference, the graphics adapter inside your computer may have failed.
In that case, you will need to install a new graphics card in to a spare PCI slot inside the system case.