Hey all, I have MacBook Pro (Late 2011) that started hard freezing on me lately and wanted to see if you could give me some ideas on how to troubleshoot it. Good news, I do have AppleCare+ so I will be utilizing that soon if it's not a quick fix. Details on the issue are: I have an external monitor plugged in to the MacBook via HDMI dongle and I use mirroring for the display. After several hours of sitting idle, the MacBook will hard freeze giving out a loud clicking sound and displaying garbled mess on the screen. Power cycling does the trick and everything is fine. The problem just started happening recently with the only changes made recently were: 1. Using an HDMI dongle now versus the VGA dongle. Will switch back today and see what happens. 2. Upgraded the RAM from 4 GB to 8 GB. 3. Just did a clean install of Mavericks. The issue was occurring before and after the clean install. I have also altered the Energy Saver settings to see if that was an issue by setting it to never when running on power adapter. That didn't change anything. Anyways, are there any logs or hardware diagnostic tools that can be run to help me troubleshoot this issue? Any tips or advice you vets can share? Thanks in advance!