Mac mini video output problems

My mini is one bunch of problems, here is what im dealing with,
On my screen i have 2 systems connected, when i switched bac from my windows pc to my mini, my screen says no signal. I can press the keyboard etc, nothing happens. Same as when the mini goes into sleep mode. It wont wake up . Si i have to reset the mini all the time. What is causing this and how could i solve it. The mini is connected with hdmi.

Hi, JO5B.
I have Dell Monitor that has 3 computers plugged into different inputs.
When switching between different machines I have to select the new input from the monitor's on screen menu. The Dell doesn't auto detect the new input and switch itself over.
Try a manual selection from the OSD, that might solve your problem.
Regards,
Scorpii

Similar Messages

Mac Mini HDMI Output Problem w/ LG L246WP

NOTE: This appears to be unrelated to the "screen flickering" that has been noted previously.
I'm using a fresh new Mac Mini 2012 with an LG L246WP LCD monitor. The monitor has HDMI, VGA and Component video inputs.
When I attach the monitor to the Mini DisplayPort output, using a Mini DisplayPort to DVI adapter connected to a DVI to HDMI cable, the display functions properly at all resolutions - including the native 1920 x 1200 resolution that I use it at normally. All resolutions are clearly displayed in the "Displays" System Preferences pane. The display looks perfect, functions properly.
When I attach the monitor to the HDMI port using an HDMI cable, the display does not fucntion properly. The display is shifted about 80-100 pixels to the left and about 20 pixels up, creating black bars on the bottom and right sides. Because of this, a large portion of the display is not visible including the menu bar and most of the left side. Additionally, the settings are reduced to "Best for Display" or "Scaled", with resolution options under "Scaled".
This is not acceptable. I had planned on simply using the Mini DisplayPort output as a workaround, since I already have the DVI adapter from an old setup, but I need to use Thunderbolt to access external hard drives for rapid data transfer. One of my Thunderbolt accessories does not have two ports, so I can't simply add the Mini DisplayPort adapter to a chain. The HDMI port needs to function properly with my monitor.
It's important to note that this monitor has functioned properly with many other comptuers running OS X, Windows and various Linux flavors and it hasn't ever done this before. I've tried several different HDMI cables, ruling that out as a problem. I've tried the HDMI to DVI adapter that ships with the Mac Mini 2012 along with two different DVI to HDMI adapters, ruling that out as a problem. I tried attaching several HDMI devices (game consoles, DVD players, etc) and they all function properly, ruling out an HDMI issue as a problem. The monitor functions properly when attached through the Mini DisplayPort to DVI adapter, so it's not a problem with the monitor. I've reset the PRAM already and the installation of OS X 10.8.1 is stock with no modifications or migrated data. I've tried the suggestions on the HDMI FAQ (although there's no "underscan" option available in Displays)
I tried to call AppleCare and after describing the problem I got disconnected with no callback. I started another ticket, described the problem, discussed the previous disconnection, was assured that I'd be called back if disconnected, and haven't heard back in two hours. So I started to dig into the problem in earnest.
This gets pretty technical.
After substantial research, it appears that this issue is related to the EDID that the monitor sends to the computer and, crucially, the way that the driver responds to it. For some reason, the HDMI port is recognizing the monitor as a CEA device instead of a monitor. As a result, it's restricting the monitor's available resolution to the native resolution that the CEA 681 Series Extension describes ("Best for Display") and all other resolutions (including 1920 x 1200) are only available as "scaled". For some reason that I can't discern, all resolutions (even the 1080i and 1080p options) have similar deformities.
I've attempted to fix this by placing an appropriate override file in /System/Library/Displays/Overrides with an edied EDID removing the CEA-enable flag from byte 127 but, even after a reboot, the OS still insists that it's a CEA device and it won't allow me to force it to recognize the monitor as a 1920 x 1200 LCD Monitor.
How did I come to this conclusion and develop the fix? A nearly identical problem description showed up on the following website, with details on how this user fixed the issue:
http://byuu.org/articles/computing/edid
They used a convoluted process that involved dismantling the monitor and flashing the EDID on the monitor itself. It fixed their problem. I'd prefer not to go through that process just because one computer has a problem with it. Frankly, I'd prefer if the new Mac Mini performed properly in the first place.
TL;DR: The Mac Mini 2012 doesn't work right with the LG L246WP through the HDMI output. Everything else works fine with it. This is very uncool. It's most likely to be an issue with the driver for the Intel HD Graphics 4000 GPU that are bundled with OS X 10.8.1. The Mac Mini 2012 won't update to 10.8.2 (yet), so I can't test it.
Anyone have any other ideas? Anyone else using a Mac Mini 2012 (or 2011) with an LG L246WP monitor? Anything simple I've missed?

Problem Resolved. But it was complicated. And a huge pain in the rear.
TL;DR: I flashed the EDID as described here. This is not recommended for the weary. Ideally, Apple should release an update OS X that will include the updated Intel HD Graphics 4000 drivers that utilize the CEA flag properly.
Here's the detailed version. As mentioned above, this isn't recommended for the weary. An improper (or interrupted) EDID flash can have seriously unpredictable effects on a monitor's performance.
Step 1: Get a Windows PC set up with a floppy drive and find a floppy disk. Use this system to format the floppy as a MS-DOS Boot Disk and copy over the "ddcw" program described at the aformentioned link.
This took awhile, but I was able to cobble together a temporary frankensystem with parts I had laying around. In installed XP and formatted the disk with XP's format tool.
Step 2: Grab EDID data from the monitor, modify it to disable CEA mode at bit 127 and make sure bit 128, the checksum, is appropriate.
This also took awhile. Several graphics cards I tried could not read or write EDID data. I ended up swapping AGP cards in my frankenstein box until I found one that worked - a generic GeForce4 4200.
Once the EDID data was written to the floppy, I edited the text file containing the EDID data to change the last two hex octets from "01 33" to "00 34" (00, to disable bit 127, and 34 is 33 + 1, which satisfies the checksum) and formatted the text file to match the sample included in the EDID_Write.zip file. Your mileage may vary - make sure the checks.
Step 3: Write EDID data to the monitor.
The link above mentioned three options: Easy (monitor's EDID is unprotected - write away!), Hard (monitor's EDID is protected - use service mode to attempt a fix), and Very Hard (monitor's EDID is protected, hardware modification is required).
Luckily my LG246WP simply needed to be put into service mode as described at the link above (menu + power) and once started up in service mode, I simply enabled "Aging Mode" (whatever that means) and attempted a DDCW write of the updated data.
Step 4: Profit!
After doing this, I powered off the monitor and powered it back on with the Mac Mini attached. The display functions PERFECTLY with HDMI out, just as it does using the Mini DisplayPort to DVI adapter.

Mac mini audio output problems

This is similar to a problem that appeared before, but with a different twist.
On 4 July all was well. On 5 July I switched on and there was no "chord" from the Mac. When I collected my mail - no sound from my speakers (which are part of my screen). Logged on to a couple of sites - no sound.
The System Profiler, under the "Audio (Built In)" category, says: "No Built-in Audio." I know that's wrong because it's always worked before and when I plug my headset in it works fine.
When I go to the Sound preferences panel in System Preferences, it finds the headset but if I unplug that it finds nothing.
I tried running the hardware test (by putting in the OS X install disc and holding D during startup.) It couldn't find a problem.
So, as far as I can see, audio output is fine for the USB headset output but not for the others. Is there a simple fix? The nearest Apple store is about 200 miles away and I don't fancy the idea of posting the Mac off.
(And I think it's still under warranty for a couple more weeks.)
Mac mini Mac OS X (10.4.10)

hello mini users with the "no audio output" problem
it seems that there are faulty output jacks in the macbook and the mac mini
there are two things you can try:
i tried everything and began thinking about what new software i had installed. it was "macam" which enables you to use older webcams on OSX. i needed that to use my webcam on skype.
macam installs a file called "macam.component"
if you have the same, do this - take that file out of:
(your hard drive)/library/quicktime - macam.component
and just put it on your desktop
restart, then in your sound pref's choose your audio output (if doesn't work restart again)
the first time i took it out, i had my sound back instantly, another time i had to choose audio output in sound prefs. you kind of have to try different things. after you get your sound back, you can put back "macam.component" to use your webcam.
it seems macam causes the problem, the two can not work at the same time.
the second thing: if you dont have "maccam" try plugging and unplugging output jack a few times and restarting until you have sound.
the problem still could be with the OSX 10.4.10 update / quicktime...or maybe even a hardware problem like others with macbooks were saying (with the red light), not sure.
people with macbooks and who have the red light on, say to use a paperclip to turn off the switch inside.
my mini does not have a red light on. i tried using a paperclip but it doesnt work.
hope this helps, beleive me i feel your pain!!!!
what good is a computer without sound?
extremely annoying problem that i hope apple looks into and fixes
-andrew

2014 mac mini dual monitor problem

I just brought a mac mini (Late 2014) i have two displays monitors connected, one HDMI to DVI. and one thunderbolt to DVI. I can have both thunderbolts connected and the problem its the same, when back from sleep ,one monitor doesn't turn on. i have to disconnect one and then both work, it only happens when the mac goes to sleep. on cold restart or turning the mac on, this problem doesn't occur. any help.

I have this same problem too. I purchased the Mac Mini with the intention of running dual monitors. I'm using the HDMI and mini-display/Thunderbolt to DVI. I've also tried MiniDisplay/Thunderbolt to HDMI and I'm experiencing the same problem as angelfromfullerton. Whenever it tries to wake from sleep, it can't decide on monitor arrangement and keeps flicking between the two, making the OS unusable and forcing a reboot... EVERY TIME. I've also experienced the issue once or twice on a cold boot. It doesn't matter which Thunderbolt port is used either.
I'm going to have to return my Mac Mini unless this problem is fixed asap.
Mac Min, OSX Yosemite (10.10).

Mac Mini with Major Problems

I'll try to make this short, but it is a looonngg problem.
About one month ago my Mac Mini began having problems when I boot up. The computer would freeze on the opening page where I put in my password. My wireless keyboard and trackpad would not work. This would be interminent at first but progressively got worse.
I spent hours on phone tech support. Finally realizing that would not help I drove the 100 mile round trip to the local Apple store for a Genius bar appointment.
The first appointment (there have been 5 - meaning 500 miles) resulted in them doing a clean install of Lion. I took the computer back to the office and guess what, the same problem.
I drove back to the Apple store, the Genius did some more work and proclaimed it fixed. It was, for about 3 days when everything started again.
More time now on tech support. One more trip to the Apple store.
This time they kept the Mac Mini for about 4 days are replaced the logic/mother board.
I got it back to the office on Thursday. Everthing works great.
Until today. I boot the computer, it gets to the screen that has the apple on it - then nothing.
I manually power it down and reboot. Same thing.
I've set up ANOTHER appointment at the Genius bar tomorrow.
My question: can I demand that they replace this machine. Between work and home I have 2 Mac Mini's, a Macbook Pro, a Macbook Air and 2 iPhones. I've never had this type of problem. I'm really tired of this.
I purchased this in February so it is in warranty.
Thanks

rwgleaves wrote:
I took it to the Apple store Genius bar today - my 5th trip - and they did just what I'd hoped. They replaced the Mac Mini with a brand new machine.
This is why I buy Mac/Apple!
Excellent new, sorry you had so much trouble on the way. And yes, Apple Stores are awesome!

Mac Mini DVI Monitor Problems

Hi all,
I'm running OSX10.8.5 on a Mac Mini 2.5 GHz Intel Core i5 with 4 GB 1600 MHz DDR3 memory and Intel HD 4000 512MB graphics.
I've just upgraded my monitor from a VGA 17" to an AOC E2462VWH 24" monitor, plugged into my computer via DVI with a Thunderbolt adaptor.
In a normal boot-up, the monitor displays video for a split second and then cuts to black. The picture works fine in Safe Boot mode but video is jerky, everything loads slower, I can't play .mov files (Quicktime tells me unknown error -101) and there is an annoying flicker every 10 seconds. The fact the monitor works fine in Safe Boot suggests to me the problem is software. Resolution is set to 1920 x 1080 @ 60Hz and OSX is not letting me change that via Settings.
I went searching for drivers only to lean it sounds like OSX deals with monitors in a plug-n-play format. Is this true?
Firstly, can I confirm my mini has the power to drive this monitor?
Besides that, can you please help me figure out how to boot this computer so the monitor displays in normal boot-up mode?
Thanks for your help!

Then it sounds like yo need one of these:
http://store.apple.com/us/product/MB571Z/A/mini-displayport-to-dual-link-dvi-ada pter

Intel Mac Mini video outpot to component video

I am looking for an adapter/converter that allows me to connect the video output of my Mac Mini to a component video receiver. I currently use a Marantz S8001 receiver with multi-room capability but unfortunately the multi-roon video switching capability on it does not support composite, DVI, or VGA input.
Mac Mini - Intel dual core, 1st generation Mac OS X (10.4.3)

What happens when you click on the scaled item in System Preferences>Displays>Display? What option are shown?
Also
If you press ALT with clicking on Scaling, it will give you ALL the available resolutions. I was able to select 1920x1080, but needed a smaller res. the 1280x768 is what I chose. works like it's supposed to.
Above from:
https://discussions.apple.com/thread/5491224?tstart=0

Mac Mini/HDTV Audio Problems

I have my Mac Mini connected to my Samsung HDTV. It worked fine and I had audio and video. Somehow, the audio stopped. I hired a professional to come and reconfigure my whole setup and he connected the Mac Mini to our home theater speaker system. It worked, fine. Now, it does not have audio. He and I have tried everything and there is no sound, but there is sound when the computer is not connected to any audio. You can hear the sound come from the computer, and you can hear sound when you connect earphones. The RCA connectors that hook to the microphone outlet will not work with the computer. What am I doing wrong? There is sound...it just will not let my TV or speakers hear it.

Given a pro could not fix it, it isn't easy to troubleshoot this sort of thing over a forum but, let's see if you can adapt from my experience with the Bravia. I am not a pro, hence tolerate my 'elementary' explanation.
1. A DVI-HDMI cable is connected from the Mini to the HDMI input on the LCD with the little audio jack beside it. Only this HDMI input, that partner's the audio jack, is relevant.
2. An audio cable is then connected from the Mini's mike jack to the audio jack beside the HDMI input. This arrangement settles audio on the LCD speakers.
3. To output audio to the 5.1 Receiver (via the LCD), I chose a channel on the LCD, in my case 'TV' ('Sat' was also available). From the 'TV' channel, twin Red/White RCAs are connected to the corresponding 'TV' channel on the 5.1. This settles audio to the 5.1 as well.
4. Turn on the LCD, select the relevant HDMI channel for the Mini and you have audio on the LCD speakers.
5. Mute the LCD speakers. Turn on the 5.1, select the 'TV' channel (on the 5.1) and there you have it, audio on the 5.1.
Hope this helps
Cheers

Mac mini has sleep problems

For the past week, my mac mini (which runs SL) did not go to sleep mode at all and when I manually put it to sleep, it wakes up in a couple of minutes. I am running SL for many months now without any issues and have not installed any new software recently, so I can't figure out what's causing these problems. I am running a couple of programs in the background, namely Air Video server (the problems continue after I have shut it down), Chronosync Scheduler and mobileme sync services. I'm using these programs all the time, without any issues so far. Thanks for any help!

Hi,
Do any programs running possibly need to access the network? I know I had to disable "wake for network access."
It's in Preferences - Energy Saver.
Just a thought..

Mac mini external speaker problems

my mac mini using an audio interface (Lexicon: Lambda) and linking with external speaker (ADAM: A5x). they can play music and video smoothly before Mavericks update recently. After the updated, I can't play music and videos with iTunes and youtube smoothly, but it is ok when played with internal speakers. I had tried to clean up my desktop files, emply trash, and release ram by OnyX, but all these does help, and i don't know wheat to do now, pls help! Thanks!

thanks all, I fix my problems finally!
I just tried the following process and then the probelm solved
1. turn off mac mini
2. unplug the usb of my audio interface
3. then change another usb port at the back my mac mini in order to plug my audio interface again
4. turn on mac mini
and it is smooth and fluencent when i play songs and videos on my mac mini now.
exactly, I don't know why my problem can be solved this way... but anyway...
this works for me!

Mac Mini 2011 - Monitor Problems - Help

My picture is not sharp... just blury. Icons, pictures, text, mostly everything is bad except high quality video files.
I just purchased a Mac Mini 2011 second option and a Samsung TA531 monitor that arrived today. Hooked it up and to my surprise, it is blury and bad quality no matter what kind of resolution i use. I also try to text smoothening through terminal.. nothing helps.
My setup:
Mac Mini 2011 - second option stock
Samsung SyncMaster T27A531
Cable: HDMI
After reading about this issue, some people recommends to use a DVI or VGA cable and claims that HDMI is not suitable for computer monitors, especially Samsung.
Please, feel really sad and lost among a lot of new computer equipment that doesn't work properly

I had the same issue and didn't want to give up my Thunderbolt port, so I opted to get a Gefen HDMI Detective Plus. What this does is make the CPU think an HDMI display is attached so that your graphics CPU 'unlocks' and full speed is back. The Gefen box can either 'learn' the code of any HDMI display in your office/home, or you can preset it as a stock 1080p display. TOTALLY solved my problem... even though it did cost $85.
Apple needs to fix this as so many people use the MINI headless.
http://www.gefen.com/kvm/ext-hdmi-edidp.jsp?prod_id=8005

Mac Mini Video Quality

Can anyone tell me how the Video Quality of the output to a HDTV if I buy the correct cables to connect to this HDTV? I am looking a "media server" and I would like to use a Mac Mini rather than an Apple TV because I can do more with the Mini (surf internet, use as DVR etc..), plus I would be able to play DVD files without having to convert them to .H264 format that would take eons.... I currently have a iBook G4 and used the S-Video adapter to connect to the HDTV set I have, and the Video quality is about par with VHS, even on DVD content (I'm not even going to think what iTMS downloaded content would look like). Thanks for your help.

Just to be clear, is this the model you have?
http://www.amazon.com/Samsung-TX-P2675WH-26-Widescreen-HDTV/dp/tech-data/B0002KQ R3C/ref=deasmtd
# VGA/SVGA input: No
# Audio outputs: 1 stereo analog (left/right RCA, fixed-level)
# Audio inputs: 3 stereo analog (left/right)
# Video outputs: 1 (composite-video)
# Video inputs: 5
# Headphone jack: Yes (.125-inch, side panel)
# Digital-video input: 1 (DVI-HDTV)
# Component video: 2 (both auto-sensing 480p/480i/720p/1080i)
# Composite video: 4
# S-video: 2
!http://ecx.images-amazon.com/images/I/413SEZ46CBL.SS500.jpg!
User manuals:
http://www.usersmanualguide.com/samsung/tv_flatcrt/tx-p2675wh

Mac Mini HTPC Output options?

I have the new Mac Mini for use as the primary HTPC. The configuration is a bit specific and Im trying to decide on output options. I have a main-viewing LCD, between two additional smaller LCD's in portrait (so three total monitors). I would like to be able to view content on the main LCD in the highest possible resolution using the HDMI, but additionally I would like to extend content onto the side LCD's. I've considered the Atlona USB to HDMI converters for both sides, but is there any way to extend higher resolution to the side monitors using the mini display port? Id prefer the content on the side monitors not be mirrored... that is the kicker. So straight splitter is out.

Well, you could drive two of the displays with the two built-in display connections and possibly the third with a USB video display adapter. But realize that the performance of the USB device may not be as strong as the built-in video.
http://eshop.macsales.com/item/Newer%20Technology/VIDU2DVIA/

Mac Mini KVM USB problem prevents boot when using certain USB ports

Hi,
Just purchased a brand new Mac Mini 2.4 Quad Core to use as a server.
This morning we removed from the box & connected it to our NTI Unimux 16-port KVM. The KVM already has 10 Mac Mini's connected (various vintages, no problems).
We connected the Mini to the KVM using HDMI for video and a USB connector.
The Mini initially refused to boot past the initial white/gray screen. It never got to the Apple or the cog.
However, we found that if the USB cable from the KVM is disconnected, the Mac Mini booted immediately.
Further, the Mini will also boot with an Apple keyboard connected.
So... you may assume that the KVM cable is bad or that there is some firmware compatability issue between the KVM and this new Mac Mini.
EXCEPT...
This Mini has 4 USB ports.
We found that the Mac Mini can boot with the KVM USB cable connected if the USB cable is connected to USB ports 2 or 4 on the Mac Mini.
If the KVM USB is connected to ports 1 or 3 on the Mini, the Mini will not boot.
The Mac Mini will boot with an Apple USB keyboard installed on any port.
Is there any logical reason for this behavior?
Thanks,
b

Hello,
Great work & very interesting thanks!
My guess is mA available & mA required, chect System Teport>Hardware>USB for like this...
USB Bus:
Host Controller Location:    Built In USB
Host Controller Driver:    AppleUSBOHCI
PCI Device ID:    0x0035
PCI Revision ID:    0x0043
PCI Vendor ID:    0x1033
Bus Number:    0x0b
Bluetooth USB Host Controller:
Version:    19.65
Bus Power (mA):    500
Speed:    Up to 12 Mb/sec
Manufacturer:    Apple, Inc.
Product ID:    0x8207
Vendor ID:    0x05ac (Apple Computer, Inc.)
General Purpose USB Hub:
Version:    1.00
Bus Power (mA):    500
Speed:    Up to 12 Mb/sec
Product ID:    0x2077
Vendor ID:    0x0451
802.11 n WLAN:
Version:    1.01
Bus Power (mA):    500
Speed:    Up to 12 Mb/sec
Manufacturer:    Ralink
Product ID:    0x5372
Serial Number:    1.0
Vendor ID:    0x148f
MegeCam:
Version:    1.00
Bus Power (mA):    500
Speed:    Up to 12 Mb/sec
Manufacturer:    MGI
Product ID:    0x8007
Vendor ID:    0x060b

Mac mini audio output

Hi, i've seen this interesting program http://www.algoriddim.net/index.html
for djs.
These djs program usually use to way to work:
- dual sound card
- mutiple output on a single sound card
This program use the second approach.... but mac mini has only an output.
I remember that my last pc was able, using a tune program, to convert an audio input to an audio output to get 5.1 system.
I wonder to know if it is possible to convert the input to output with some kinda program, or is there any way to get working the pre-cue with a mini.

hello mini users with the "no audio output" problem
it seems that there are faulty output jacks in the macbook and the mac mini
there are two things you can try:
i tried everything and began thinking about what new software i had installed. it was "macam" which enables you to use older webcams on OSX. i needed that to use my webcam on skype.
macam installs a file called "macam.component"
if you have the same, do this - take that file out of:
(your hard drive)/library/quicktime - macam.component
and just put it on your desktop
restart, then in your sound pref's choose your audio output (if doesn't work restart again)
the first time i took it out, i had my sound back instantly, another time i had to choose audio output in sound prefs. you kind of have to try different things. after you get your sound back, you can put back "macam.component" to use your webcam.
it seems macam causes the problem, the two can not work at the same time.
the second thing: if you dont have "maccam" try plugging and unplugging output jack a few times and restarting until you have sound.
the problem still could be with the OSX 10.4.10 update / quicktime...or maybe even a hardware problem like others with macbooks were saying (with the red light), not sure.
people with macbooks and who have the red light on, say to use a paperclip to turn off the switch inside.
my mini does not have a red light on. i tried using a paperclip but it doesnt work.
hope this helps, beleive me i feel your pain!!!!
what good is a computer without sound?
extremely annoying problem that i hope apple looks into and fixes
-andrew

Mac mini video output problems

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