Hardware or the CASE?

Something is causing my case to overheat but what. When I first boot up, within a few minutes the right rear of the case is starting to get warm. I just noticed this happening. Within a short time the rear of the case is very warm and as I proceed working, the case seems to be getting more than warm but hot. Now this only pertains to the particular area mentioned. The rest of the case is cool and the fan is running. Yes I did check the running process of the internal hardware and the external and all are up and running when accessed.
This is a matter of concern as I would not want to have this affect any of the internal hardware including the hard drive. I have pulled the connection wires for the scanner and for my digital camera. But the heating process continues. My computer system is 3 years old, if that should affect anything.
Thanks. Any suggestions would be greatly appreciated.

 

I suppose the most obvious culprit would be the power supply. Is the upper rear of the case where it's getting warm? Run with the case door off and feel the casing of the power supply.

I wouldn't think anything else in a PC would have the potential to cause the outside metal of your case to heat up. Even if you put your HSF on backwards and your cpu was at 65-70C (Danger! Will Robinson! ) it still wouldn't heat up your outside case metal.

This doesn't sound good. If your power supply is the culprit, I'd consider replacing it.

 

Danger!

Agree with Chiles4. Make sure you're NOT grounded. Desconnect power from mains and touch outside of power supply near where power cord enters and if thats what's hot, stop using computer until new power supply is installed.