i followed the online directions to clear the CMOS...not sure what that was supposed to do or how to tell if it was accomplished..
I am sure you do not want get bogged down with too much tech, but, the CMOS holds some basic information that kick starts the computer when it passed information to the BIOS. It is powered by a small button battery, sometimes the information gets corrupted and clearing the CMOS resets it. In your case, it did work because the BIOS has started to configure other parts of your computer.
The PSU light should come on to say ther is power on, the fan starts when you start the computer.
Not hearing any beeps could indicate a problem but, possible the beeper has blown.
The case fan error was given because it was not detected one as you had removed it.
So that we know what and what has not been done, please answer every question and only perform steps as instructed, it may be a bit slow but we will get there.
Phillpower2 asked. "are also using the original PSU that was being used when the computer failed??"
and, can you try a known good PSU"??
So, at the moment you have the following attached,
2 cables to the MB from the PSU?
CPU fan plug to the CPU fan header on the MB?
One case fan?
Monitor to the MB video socket?Have you any RAM installed?