I'm looking for advice from this board on how I should proceed. I purchased a new 21.5" iMac with Fusion drive for my wife. It is 3 weeks old and was running great until this past Thursday night when it froze. I tried to restart and it wouldn't boot (3 beeps repeated, black screen). My wife called Apple support. After being lectured on the fact that we should have bought AppleCare (this is a 3-week old computer, still under warranty!!), she was told to bring the computer to the Apple Store. However, the local Apple store had no appointments available for the next 2 days. Speaking to the manager of the store, didn't help the situation. So here it is 3-days later, and we are finally bringing it in today. I did some additional investigation and found that after letting it sit for a while the system will boot but within about 5 min. it freezes again - same pattern. I was able to run a quick test with Diskutil during one of its uptimes and it reported ok (obviously not a thorough test). I also tried to run low level system diagnostics, but it hung during the test. So, I suspect it's a memory problem. My concern is 2-fold: 1. Should I demand a new computer? I'm worried that given the complexity of servicing an iMac that this may be the beginning of a chain of problems. 2. Should we just fight with apple to return the Mac? We were about 4 days outside of the 14-day return window when it failed. My wife is now thoroughly disgusted and wants to return the iMac and go back to her Windows desktop. She was concerned about switching to Mac (learning a new system), and I was the one who pushed her, so now I'm not looking too smart. Again, given the lack of serviceability with this computer, even I'm getting worried. Thanks for any advise.