crwdns2934241:0crwdne2934241:0 neil krough

crwdns2947189:0crwdne2947189:0:

Machine shuts down after 20 minutes.

crwdns2934249:0crwdne2934249:0:

My iMac will start but after  approximately 20 minutes on it will just shut down. Could this be a power supply problem or logic board?

crwdns2866306:0crwdne2866306:0:

iMac Intel 20" EMC 2133 and 2210

crwdns2915684:0crwdne2915684:0:

open