Monitor not receiving signal need assistance

Hi all yesterday i was playing dayz and left for an hour to go to the gym. When i left i did not shut off my computer but rather my monitor. When i returned my monitor had no signal and when i turn on my computer it wont receive one. Opening up my comp all the fans and lights are working including the graphics card. The only lights that are not on are my keyboard and mouse.

I started to troubleshoot by removing the ram and turning the comp on, i did not hear a beep however i do not have an internal speaker. I can confirm the monitor is fine however i cant check my g card because i do not have a spare. The card however has been working great with no hiccups at all. My guess is the motherboard bit the dust does anyone have any other ideasAlso when i turn it on it sounds like the processor and hd are working

Thanks