I have been running two displays on my unibody Mini since mid-June 2010. One monitor is a 23" HP connected via DVI (I think? -- doesn't matter, though) The other is a 26" Samsung LED TV connected via HDMI. They've been running perfectly until today. At first, the TV didn't even detect anything hooked up into the HDMI port. Then I turned off my mini, unplugged everything, plugged it all back in and now the TV acknowledges that something is plugged into the HDMI port, but it says that there is no signal. I have tried different HDMI cables and also tried plugging them into different ports. The cables and ports on the TV do work, because I tested them using my xbox 360. I also went to System Preferences and Displays and asked it to detect displays and it only detected my monitor. And now.. actually, my monitor keeps flicking to a blue screen (which it used to do when I turned the TV on in order to watch something from the Mini). Any help or insight would be very much appreciated. Thank you. And sorry about the long-winded post; I wanted to include all the information I could. EDIT: Just ran the hardware test and it says there were no problems found. I'm not sure if it would be the video card, since the regular monitor is working (relatively) fine.