Hey,
Im having some problem where my computer may randomly shut down(or more like turn off, it seems like something just turns off it doesn't go through the shut down sequence) and now it will not start up. I can turn on the power and some things seem to be on (power supply, fan, graphics card all seem to be on), but nothing gets sent to the screen and the USB plugs dont work. I'm not really sure what this is. Any help would be appreciated, thanks!

- Percy

unplug the moniter cable from the back of the computer. If you get a message saying no signal input then its the computer and I would be looking at a motherboard but this is not my expertise

Had the same problem as well with an old pc, took it to a computer shop and he replaced the video card. no help. in the end it needed a whole new motherboard.

Can you plug a new monitor into the pc?

also try another graphics card if possible, unfortunatly this is going to be a process of elimination