Mac Mini (2012) HDMI losing sync (blank screen/snow)

My Mac Mini went back yesterday because there is no timeline on the fix, although apparently Apple says the fix is software (firmware), so if you can hold out the patch will come via Software Updates

I have experienced this issue as well. I just purchased the 2012 Mac Mini i5 model about a week ago from my local apple retailer. Since having it, my display has gone black 2-3 times. It only lasts for a split second. The display goes back and then resumes exactly where it left off with no other apparent effects. I am using a 23" AOC i2367fh display, and I am running HDMI to HDMI.

I contact Apple Support and was called within 2-3 minutes, and the experience was surprisingly pleasant. The rep said that this issue has been reported and is being investigated.

He gave me a case number as well - 383059530. If you are experiencing this problem, reference this case number.

I didn't really get an answer other than, "...keep checking for updates."

To add my experience. I returned my Mini Nov 21, after fussing for 1 week with poor display and intermittent black screens and after Tech Support advised no knowledge of the problem. (Samsung monitor via HDMI). I returned it via Genius Bar appointment to permit TS to have access to it for analysis - at their request. I will re-purchase once problem is fully resolved.

Aubrey

Good news everyone, click on your Software Updater....

Santa came early and it looks like Apple has released a Mac mini EFI Firmware Update 1.7 🙂

For those whose Software Updater doesn't show this firmware update, you can also find it here:

http://support.apple.com/kb/DL1616?viewlocale=en_US&locale=en_US

Please let Apple know if the new firmware has fixed your issues or not 🙂

Did the update, looked good for a while, but no cigar :-( Before the update it would flicker randomly and often. After the update it flickers randomly but seldom. I guess that is an improvement, just not a fix.

Lennie

After the firmware 1.7 update I still have one blink every 6 seconds were my old MM 2011 is perfect. I think this issue will become a nightmare for a lot of customers..

My MM is connected by HDMI to HDMI with Marantz SR7005 AVR and then to a Pioneer Kuro 50" Plasma.

I'm hoping Apple engineers too see these post and provide a new update shortly because, as is, it is unusable.

same old story here.... worked fine for 30 minutes... now... the issue happens again

I wonder why it doesn't work for some?

More info & reports...

http://www.xlr8yourmac.com/index.html#2012MiniEFIUpdate

http://www.xlr8yourmac.com/feedback/2012MiniHDMIVideoProblems.html

Don't know why it doesn't work for me, but nothing has changed after the 1.7 firmware update. Obviusly I've rebooted many times, powered-off, disconnected and re-connected HDMI, powered-off and on the AVR and the TV: nothing.

I've also reset the NVRAM and PRAM.. same. I think there is something not working well in the HDCP in these late 2012 mini.

I'm strarting to suspect a HW issue that is worse on some than others.

Applied the firmware update and has been going strong for one hour now. No more flickering or white snowy flashes. As well I re-calibrated my display settings and the video looks slightly better. Not as washed out looking. So far so good Apple. Nicely done! Thanks :-)

Thanks for the update.

Anyone notice that AFTER the update that their picture contrast is WAY LOW?

after install, my screen is flat as heck

Thanks, what kind of Monitoor is it, & how much VRAM is reported now?