I have an HP envy h-8 1534, Specs are here:
I push the power button, power light comes on, fans turn on, monitor stays in standy mode. If I plug the monitor in after I turn it on the monitor comes on for a second (with a blank screen) then says no input signal. I've tried multiple monitors / cables. All monitors / cables work with other computers. The computer does not have integrated graphics. I've bought a new graphics card (EVGA GTX 750ti), because I was sure that was the problem, it has the same problem.
The computer was working fine one morning, tried to use it later that day and had this problem.
Any help would be much appreciated.