The green light means that your motherboard is receiving power from your power supply.
Is there fan activity? If yes, try to remove the memory sticks from your motherboard and try to boot it without them. Do you get any beep?
Have your tried with a different video card?
Thank you for responding!
Well, I did remove the 2 RAM sticks and now I have a blinking green light and out of the speaker is not a "beep" but more of a "tap-tap" sound. I still can't turn the computer on.
There is no fan activity...and I don't have another video card. Wondering if the power supply is going out?