I'm not sure if it would be the video card, since the regular monitor is working (relatively) fine. Thank you.Īnd sorry about the long-winded post I wanted to include all the information I could.ĮDIT: Just ran the hardware test and it says there were no problems found. 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).Īny help or insight would be very much appreciated. I also went to System Preferences and Displays and asked it to detect displays and it only detected my monitor.Īnd now. Retina display: 15.4-inch (diagonal) LED-backlit display with IPS technology 2880-by-1800 resolution at 220 pixels per inch with support for millions of colors. The cables and ports on the TV do work, because I tested them using my xbox 360. I have tried different HDMI cables and also tried plugging them into different ports. 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. They've been running perfectly until today.Īt first, the TV didn't even detect anything hooked up into the HDMI port. The other is a 26' Samsung LED TV connected via HDMI.

One monitor is a 23' HP connected via DVI (I think? - doesn't matter, though) Press and hold the Option key, and a Detect. Navigate to System Preferences -> Displays. If macOS doesn’t recognize your external display automatically, you can try to force the connection using macOS’s Detect Displays feature: Select the Apple logo in your Mac’s menu bar. I have been running two displays on my unibody Mini since mid-June 2010. Use macOS’s Hidden Detect Displays Feature.

Hdmi not working mac 15 inch