Start Up Freezing

My computer is freezing on startup. It as done this before, but I have always got around it by unplugging and replugging the power cord to the computer, but now this trick no longer works. Here's what I know.

1. The first thing I attempted was to boot from my CD. I went into to setup and only found the hard drive and floppy drive, no CD drive was shown. This missing CD drive makes me wonder if this may be the problem. How do I get setup to see my CD Drive maybe a cable problem?
2. I have tried to start the computer in every mode available, safe mode, last configuration known, recovery, etc. No matter what I try the computer seems to freeze at the same point.

The computer appears to be looking for something that it can't find. Could it be hardware related?

Thanks

 

Thanks for the response. It was just as I suspected. Right after I posted this message I removed the case and disconnected the cable from the CD drive and the computer started right up. I could tell something wasn't responsing and when I didn't see the CD drive in my setup with the other drive I got very suspicious. The CD Drive is getting power so I suspected a bad cable of maybe the CD Drive. I will replace the cable first. I should have another cable laying around here somewhere