i have got a computer and attached a monitor to it and it worked but only in safe mode then it completly stoped working so I bought a new monitor thinking this would solve the problem but still there is no input signal ?
and on top of this the computer won't boot propally because it fires up propally and then it goes quite and when I turn off it by the power button it turns off instantly even if I just press it so by this I know it has not booted up propally, any solotions ? :)
i also have that kind of problem with my computer many times "no signal input".
based of what I experience with my computer, all I did to solve this kind of problem is that I open my cpu pull out the graphics card and clean the graphics cards pins and also with the pci/pcie/agp bus slot. also the dvi or vga connectors. sometimes dirt affect the contact of the graphics card to the motherboard.
I try any way to solve this problem from my PSU, Cable from monitor to CPU, add graphic card and etc. but no one working... until I find the problem is from my home voltage source which always sounded like a something want to burn. check your voltage source, who knows the problem is same like me and you can solve it.
If your system has a graphics card other than the on-board one:
i) check if the monitor is connected to the right one,
ii) check if the right graphich card is activated,
iii) check the cables and connections
before blaming the board I say.