Determining Abnormal Noise Source

I've been trying to determine the source of the abnormal noise coming from my D4500. It sounds like it could be one of the 3 fans in the system (CPU, PSU, or video card). It's hard to tell which just by listening and it doesn't always happen. Dell Support suggested that I run an abnormal noise test from the utility partition, but I get a "no utility partition found" message. I believe this is because I replaced the hard drive some time ago. The next thing they suggested was to try to run the diagnosis from the Dell Resources CD, but for the life of me, I can't locate the Symptom Tree or the Abnormal Noise Test Set after booting to the Resource CD. I do get a menu of test sets for everything else but nothing that links me to the abnormal noise test. At Dell's suggestion I ran the Advance Test which took a couple of hours but it didn't seem to test the fan's by speeding them up, from what I can tell. I did get one failure on the floppy drive (an uncorrectable cyclic redundancy or error code correction data error) but this doesn't seem to apply to the noise problem.

Any suggestions on how to determine the noise source or how to get to the abnormal noise test on the Resource CD?