crwdns2934241:0crwdne2934241:0 Erik

crwdns2934249:0crwdne2934249:0:

Those overheat like no other so I am guessing a bad capacitor on the board or the power supply.

These are not easy to open, but if you can get it open you will look for bulging or leaking capacitors. The power supply will require to do additional breakdown to open it up.

here is the teardown for your iMac.

[http://www.ifixit.com/Device/iMac_Intel_24%22_EMC_2111]

crwdns2915684:0crwdne2915684:0:

open