Computer gone dead, need help bad

I didn't know where to put this, so here goes,need help bad, I had my computer on and when i came back to it it had froze so I turn it off and then back on and nothing on the screen at all. I took the back off and there is a red light near the ram module. just did this all of a sudden. Do anyone have a idea,when you start it there is no beep, just come on as usual, i tried the monitor with another and it works and the hard drive works in another computer, but it has to be something else, i checked the connectors, all seem to be connected, fan running but no display at all, no light in front, but activity light when i press start