However, since then I have changed my power supply (from 300watt to 500 watt), motherboard, and case because the motherboard I got would not work with the power switch cord (or something along those lines was what my friend told me). My new motherboard is a MSI 760GM-P35 if you need to know that. The problem remains the same. I read in a forum to try starting it without the graphics card, so I removed it and tried turning the power on, but still the same problem.
Please, if you can help me, I'd really appreciate it- as would my husband who is probably upset with me for kicking him off his game every time I need to do work on the computer!