Hi, Have a curious problem where my mac mini won't restart - but boots fine when turned off and on again. I've recently encrypted my hard drive and it seemed to happen after installing the latest updates (but that could just be because it's the first time I've done a restart since the encryption). It does the boot noise and then nothing - a blank screen. I've tried resetting the SMC and NVRAM and booting into safe mode, running disk utility etc. but nothing seems to fix it. It's not a major problem since I really only need to reboot when installing upgrades but my concern would be it's indicative of a wider problem. Have a genius appointment next week but was wondering if anyone had experienced something similar? Mini is a late 2012 2.6ghz i7 with SSD.