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cac-1170 NO SIGNAL WITH MAC MINI 2014. NO PROBLEM WITH MACBOOK PRO 2015 RETINA

Updated on 07-06-2017 in Adapters and Cables
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16 on 21-04-2017

hi, i’m ruben from italy. i’ve bought a cac-1170 adapter to connect my mac mini late 2014 (with intel iris vga) to my hisense h40m3300. i’ve tried to connect to all 4 hdmi ports (2 of them are @ 30hz the other @40hz) but i’ve always have “no signal”

if i connect the same adapter, with the same cable to the same tv with my macbook pro 2015, it works without problem. what can i do ???

i’ve discovered one thing: if i boot the mac mini connected with hdmi, than i disconnect the hdmi and i connect it to the adapter, i have the image at 4k but @ 26hz!!

please help

thanks

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MST1407 0 on 25-04-2017

Hi Phantom,

Although you most probably saw the email answer you got from [email protected] just to make sure ….

I am quite sure your TV has 2 HDMI2.0 port supporting 4K 60 Hz.

  • Setup

Setups with TV’s normally work best by making a custom resolution, in this case for: 3840*2160 at 60 Hz with Timing Standard set to CVT-RB (Reduced Blanking ).

(For setups with Monitors Timing Standard can remain on “auto”.)

On most  TV’s you will need to do some settings  like  “Enhanced Mode”/ “PC-Mode” and/or  “UHD Color” for the HDMI 2.0 port in use.

Please make sure the HDMI port of the Screen/TV supports 4K 60 Hz, often not all HDMI inputs support that.

Please make sure the Software of the TV is updated

Please make sure the HDMI Cable is capable of 4K 60Hz / 18Gbps.

To make a custom resolution on MAC OSx and do that Timing Standard setting, you will probably need to make use of a program like SwitchResX.

Make sure to make use a new users (or first remove all existing users when you already have used SwitchResX before).

We do have user feedback that they have it running without such setting on 10.12.4, this does sometimes involve making new user or even re-installing the OS completely …

Apparently old files are “in the way” when using the upgrade feature …

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Phantom 2 on 25-04-2017

Hi, thanks for the reply. Problem is that if i connect mac mini with the adapter I HAVE NO SIGNAL SINCE BOOT! 

if i disconnect the cdmi, connect the hdmi with the adapter, i have the image but at 30hz. if i set the image at 60hz with switches it remain @ 30hz. if then i try to reboot, i have no signal

MST1407 on 26-04-2017

Hi Phantom,

That is weird. I mean it seems that all your hardware and cables are working, just not in 4K 60Hz. Ar you sure your Mac Mini can output 4K at 60Hz over the DP ouput ?
Or what CPU you have inside, os i can check ?

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Phantom on 26-04-2017

I’ve tried all things with another tv (Samsung 4K) of a friend of mine. Same identical thing. My mac is a Mac mini late 2014 with iris vga card and i5 processor

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Phantom 1 on 26-04-2017

so what should i do? i’m trying to format the mac mini…but i don’t think that it will be a solution..

MST1407 on 01-05-2017

Hi Phantom,

It couls still be different Intel i5 CPU’s but the highest spec one i could find is the Intel i5-4308U with Iris 5100 graphics and that does max resultion of 3200×2000 60Hz over the DP output, so no support for 4K unfortunately 🙁

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Phantom 5 on 03-05-2017

?!?!?!?!? my mac mini supports OFFICIALLY 4k@30hz through display port. with your adapter i havent any picture on the screen! NO SIGNAL!!!!

“

This type of resolution is supported on 4th generation Intel® Core™ processor family (Intel® Iris™ Pro Graphics 5200 / Intel® Iris™ Graphics 5100, Intel® HD Graphics 5000 / 4600 / 4400 / 4200)

See the following supported screen resolutions through DP 1.2

DisplayPort* 1.2 / eDP*

H-Processors: 3840 x 2160@60Hz

U-Processors: 3200 x 2000 @60 Hz, 3840×2160@30Hz”

 

THIS GUY HAS THE SAME IDENTICAL MAC OF MINE. AND IT WORKS!

 

 

MST1407 on 04-05-2017

yes indeed, 4k 30 Hz should work.
Non of the tips of “this guy” was helpfull for you ?

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Phantom on 04-05-2017

No. Even at 30hz I can’t see anything on the screen. And, however, the guy use it @60hz

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MST1407 on 04-05-2017

The only thing i can think of is that the Mac Mini is not able to read the EDID info coming from the screen at boot in a proper mannery, and therefor offers a signal that the Screen does not understand/support.
You have a windows machine you can use to Update firmware for the Adapter ?
Or a bootcamp machine ? I mean we have recently got new firmware for the adapter, but that updater program does not work on MAC Os 🙁
I am not sure if that will solve the issue, but it is worth the try i would say,

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Phantom on 04-05-2017

Yes I can try

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MST1407 on 05-05-2017

I will have supprot to send you an email today

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Phantom 1 on 15-05-2017

so?

MST1407 on 15-05-2017

i am asuming you did not receive the email with the firmware update … i will tell support to send it again right now

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faltho 1 on 06-06-2017

4K 60hz works with my Mac mini 2014 and uhd lg tv using switchres but after Mac mini sleep/wake up no picture. Only restart gets me back to 4K 30hz and then manually 60hz 4K again. Where do I get the latest firmware from?

MST1407 on 07-06-2017

Hello faltho,
i will ask [email protected] to send it over to you

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