Overheating iMac (early 2007 24 inch)
Hi all. I have an early 2007 iMac that has been working great since I bought it in early 2008. I currently have Lion loaded on it. I typically let it sleep when not in use, but lately have been keeping it on since I use it to watch movies on Apple TV. Today I walked into the office and the internal fan on it was at full speed. The iMac was working fine. I turned it off for a few hours and turned it back on and am using it. It seems to be fine- been on for 45 minutes with no high speed fan noise. I do hear the normal speed fan runing.
Should I be concerned? I would like to clean dust out of it. I am guessing that may be the culpret. Are there some tutorials somewhere that instruct you on how to take it apart so I can do that? It is out of warranty and I do "dabble" with PC computer repair. Any diagnostics I could run to see if I have an overheating issue?
Has this happened to others and are there suggestions. Thanks.
Mark
iMac, Mac OS X (10.7.2), 2009 iMac, leg iPhone, iPad2