I've got a side of the case off. All the fans that are there are turning. There is a place for a front fan, but no fan there. Unless someone stole a fan, that is not new. The plastic front of the case would have pretty much blocked it. No obvious leakage from anything. The power supply is a sealed unit, Enlight Corporation. Cannot even look inside.
Any ideas?
In case someone finds them inspiring, I'm going to get my camera and take some pictures.