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Short interference (snow like) Mac Mini i7 (Late 2012)

My brand new Mac Mini has a strange error which i have never seen on any computer. At rare intervals my monitor shows a short (1 sec) interference. During this brief moment my apple cinema display shows 'multi colored snow'. It looks like the 'snow-interference' on old school tv's, but these speckles are in black, white AND red, green & blue.


I've got a cinema display connected through the provided Apple HDMI-DVI converter. The display itself never showed any interference on my old mac mini.


Does anyone experiences the same problem?

or.. does anyone has a clue what's happening here?


Cheers,

Bruno

Mac mini, OS X Mountain Lion (10.8.2), Mac Mini 2,3 Ghz I7 (Late 2012)

Posted on Oct 27, 2012 4:36 AM

Reply
78 replies

Dec 11, 2012 5:27 AM in response to BDAqua

BDAqua wrote:



I have connected my screens the other way around this time.


Hi, thanks for the report, but can you try with the monitors the original way?

I think the blackouts were still happening on the HDMI output but the monitor that is connected seems to handle them differently. The Formac monitor just shows some slight 'tearing' at the bottom of the screen. You have to be looking directly at it to see it.


Performed the FFI update and so far not seen anything untoward, but it was happening so irregularly.


I will post again if anything happens, which I sincerely hope not! 🙂

Dec 15, 2012 8:41 AM in response to Evansgo

I think the update partially fixes the problem. I no longer get the black screens randomly while playing flash games, watching videos, etc. However, I still get the snow screen when my display wakes up from sleep. About 50% of the time it never comes back and I have to power cycle my monitor.


I'm using the HDMI to DVI adapter on an Acer H233H 23" display. As the display supports HDMI, I'm going to try buying a cable and see if a direct connection without the adapter works. There's obviously a problem with HDCP negotiation still.

Dec 30, 2012 3:04 PM in response to Lucas Holt

I would agree with you Lucas. Recently I've purchased the mini display port to dvi adapter in the hopes that the snow like interferance would be resolved (thinking that it was only HDMI related). Not the case, I'm still getting the snow interference from time to time.


This is my first Mac (I've still got my Windows box hooked up)....hoping Apple fixes this soon, because I like the experience so far.


Jason

Jan 1, 2013 2:52 PM in response to Kelly Crossley

Of course there aren't any follow up posts. How many people are going to take the time to come back to say it worked really? You can see on the macrumors forums that some did respond to say it worked fine. Most people have no need to come back to a support forum once their support issue is resolved.


You don't call the cable company after their tech comes out to tell them that he fixed it.

Jan 1, 2013 3:30 PM in response to Morsalmararc

Well perhaps you have a lot more discretionary income than I do, but I'm not dropping a grand on something until I'm sure it works. Perhaps posting a link to something that substantiates that the fix was effective might be more helpful than critizing me for asking for some user feedback.


BTW, here's the fix for interested parties:

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

Jan 1, 2013 6:59 PM in response to Kelly Crossley

Thought I would chip in here, I had my first MacMini 'captured' by Apple in order to sort the HDMI problem. I received the replacement machine and applied the 1.7 EFI update and have not encountered any problems running dual monitor using both the HDMI and MDP outputs.


As regards USB3 and bluetooth, I have two USB3 hard drives a Hitachi 1TB Touro and a G-Technology 1TB drive, These are both 2.5" formfactor bus powered external drives. Initially when I had just the 1TB Touro I sat it directly on top of the MM and this did cause problems with my bluetooth trackpad. Moving the drive so it sat alongside the MM and all my bluetooth problems have gone away. With both drives running, one acts as a Time Machine drive the other a Carbon Copy Clone Drive, I encounter no problems using bluetooth.


So yes if you want to have a USB3 drive on top of the MacMini you will encounter problems, sat alongside no problems.


I am very pleased with the performance of this new MM, and USB3 for conventional 'mechanical drives' fair zips along 😀


Hope that helps?

Short interference (snow like) Mac Mini i7 (Late 2012)

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