Please don't close this...
Sorry for reopening an old thread but I don't see the need to start a new one as I have the above problem too.
I have the Dell 9100 or 9150, can't remember which, not at home now.
I was testing the PSU on my parents PC last night as theirs isn't working so I used my one from the Dell to check.
While removing it, I had to unplug the fan card cage connector, you can see it on the motherboard PIC here
Problem now is, I am getting the error like previous poster because I can't plug it back on. I bent the pins.
If I run the PC with that particular fan not running, will it soon go pop?