My workstation is in need of some maintenance. I have been dealing with a loud fan noise for a while now. Toward that end I "presumed" ... (Oh NO) that the issue was the CPU fan`.
So I ordered a replacement which was shipped from China and took a month to get to me.
Swapping it out I find the same noise coming from the case.
So ... I cracked the case again and plugged it up only to find the sound was coming from the power supply and NOT the CPU fan.
This only goes to show you that one should check things out MUCH better than I did.
So the CPU fan got a nice coolermaster upgrade and the bloody new power supply is on order and I'll swap it out in due time.
Yes, this was not a great example of troubleshooting in action but I got by with the primary waste being time waiting on the fan. Here's to exercising a more acceptable level of due diligence before the fact in the future.