Will not power up.
Bought an early 2009 iMac 24 off Craigslist yesterday. Everything tested fine at the seller's office. I bring it home, plug it into a surge protector, push the power button and ... nothing. No beep, no fan, no power, completely dead.
I've tried replacing the power cord, keyboard, mouse; I even plugged it into another wall socket. No joy.
What are my next steps? A power supply swap?
You state you tried another socket but did you try it without the surge protector? If not that would be the first thing I would try. Next I would check that my memory was firmly in place. Check out those items and get back to us. If it was working at the sellers office it should be working at your house. Don't be in a hurry to change parts--lets work this out.