Computer problems...Again!

well, I got my system back the other day from Geeksquad when I came across another problem...

My computer now is not starting up. When I press the power button, my DVD drive USUALLY makes 1 beep sound than proceeds to boot up. Right now, Its REPEATING the sound over and over and not going any further. My computers just sitting at a black screen and the monitors light is staying at the dim yellowish as if its not getting power or reading. I tried unhooking the jumper cable to it but no luck. Still the same thing. Sometimes itll beep a few times than stop but it wont go any further.

This is frustrating as I just paid a fee to get it fixed only to come across another problem.

Any of you guys good with computers might be able to help me out? And if you do would it be easier if we spoke over the phone instead of posting? Would be greatly appreciated.

McClintock