T540p / T440p + UltraDock + external display issues

Hello

I am having trouble with the t540p in the UltraDock.

I have a Setup with 3 screens:

-internal

-external on DVI

-external on DisplayPort
The more external are connected to the UltraDock.

I had the problem, that the external monitor on the blanks of DVI ports frequently (about every 15 minutes) for 2-3 seconds.

Less frequently (about once every 1-2 hours) all white external monitors for 5 to 10 seconds and you can hear the Windows sound in the speakers to disconnect and reconnect the devices.

Another anomaly is that when I use the t540p without the docking station (but a power supply connected) the screen fades until the "battery level" from time to time, I discovered (also only for a few seconds) and the battery symbol changes from "operation network" to "battery operation" so that the light is dimmed.

In this case the two power supplies (that comes with the t540p and that comes with the UltraDock)

Maybe these effects could be linked somehow?

Anyone of you knows the same problems or got any idea what could be the problem here?

Best regards

André


Tags: ThinkPad Notebooks

Similar Questions

  • T440p and external display

    I'm having a problem find Lenovo T440p with HD4600 and Eizo S2100 work as an external display. I was able to get it work only with resolution 1240 x 1024 however monitors maximum is 1600 x 1200.

    The operating system is Windows Pro 8.1.

    Connection between these two is via a Dock Pro and DVI - D cable.

    I've tried 5 different drivers of Lenovo and Intel, but not luck.

    Any suggestions?

    Hi vacancies,

    the latest drivers directly from Intel has solved my problem.

    You should try it too. The release date of this driver is 20.11.2013 and version no. 15.33.8.64.3345 (10.18.10.3345).

    According to my information to support Eizo was a problem with the wrong frequency for this resolution.

    Kind regards
    Matus

  • T520/W520 external display issues

    Hello community,

    We have problems connecting to an external monitor via the Port replicator. In the BIOs, it is not possible to select the numeric value of 1 or 2. During boot no picture appears on the external display.

    It is very annoying because we want to use Pre-startup-authentication.

    problem is solved. We must choose the first dedicated graphics processor and disable recognization OPTIMUS OS

  • external display issues

    I had recently a 2012 13 "unibody macbook pro by a friend who has updated.  He had trouble with it and the replaced hard disk after a couple of times under warranty got tired of not being able to get his work done and got a new macbook pro after the expiration of the warranty.  I had to replace the hard drive cable and put an ssd in it, and now its working great.  Yesterday I tried to plug in my monitor 20 "1920 x 1080 dell via the port external mini display and it detects the monitor very well, but the monitor was cut every few seconds as he was losing the signal.  After messing around a bit, I realized that if I set the resolution 1080i or 720 p it works very well, although 1080i looks really fuzzy, somewhat similar and old crt monitor who did not properly defined phase.  I did a lot of research and found many people with the same problem, but most of them have been posted years ago and had no other resolution that the people complaining that apple was aware of the problem and refused to fix.  I was wondering if there was a way to solve this problem, because it would be nice to work on the largest screen in some applications.  This is my first time owning a mac and the first time using one since about 2002

    You have another cable to try?

  • External display using Vision Switcher issues

    * Original title: external display issues

    Hi all

    I have problems with external screens.

    First of all:

    Windows 7 pro

    ATI Radeon HD 5450

    I need to be a source of the computer, a switch of vision vision. When I plug the changer (after that I got the computer, so that the true monitor displays already) the computer goes into double mode with the secondary monitor displaying only. It is, the mixer is the second monitor, and the switch does not display the vision (I go to black magic for this part of the problem).

    Unfortunately, windows + P does not change the external display settings.

    Windows + P changes display settings when I have two different monitors connected (not the selector).

    Until I plug in an external display, is there a way to force the computer to always mirror appears with two monitors output? Note that I plugged a second true monitor and changed the mirror screen and the display of these two. When I put the selector, he returned to display only mirrored, high school.

    Or y at - it a keyboard shortcut to switch the primary and secondary monitors around? Or if I could write a macro?

    Just to say it again - I do not see the computer where no matter what windows.

    Thanks in advance!

    Hello

    I understand the inconvenience caused. Let me help you with the issue.

    This could be a problem with the display settings. I suggest you to this first set the primary monitor as the primary monitor. Follow the steps from the link http://windows.microsoft.com/en-IN/windows-vista/Change-display-settings-on-multiple-monitors.

    Connect the switch, then check if the problem persists. If the problem persists, then update your drivers for your adapter display card on the Web site of the manufacturer and the device and check if it helps.

    Just reply with the results and we will continue to help you further.

  • End of 2015 4 external K iMac display issues

    Hello people. My 27-inch 1920 x 1080 monitor is bugging me. It looks terrible as a second screen. So, I'm looking to get a second monitor 4K for my iMac. The main reason for this is that in my opinion the Apple Thunderbolt monitors 2K resolution aka 2560 x 1440 pixels.

    I read some mixed reviews on the iMac being incapable of managing a screen 4K of UHD to native mode (forgive the lack of the proper term).

    So I did some research more. I'm starting to think that the "Default" is in 2K resolution. If that's the case I suspect that the next option is 4K and 5K, then to "more space".

    Some thoughts: I know that I can call apple support. However, I suspect that they don't know the answer they don't sell a 4K display. I can always call according to the answers here.

    1. the spectator (someone else or I) will use even the other modes? I'm trying to acclimate to the option more space and it is a review. If I go back to 'Default' scaling the 4 K might be a waste of money.

    2 suppose I decided I can live with the option to the right of the "Default" or "More space". The new iMac will be able to run two monitors in this mode? Or will the card really bogged down? I mean if this is the case, it might be a mute point as well.

    3 Apple doesn't sell a thunderbolt 4 K screen that is convincing. The big question is "what is the reason for this? If this is the point of ball one I can keep buying a second monitor 4K. If it bullet point two and the iMac is not enough to manage the display that will be disappointing and I can be forced into a 2K monitor anything.

    So I hope that users with power in the community have a few comments and or experience with a second screen 4K. Bravo and thanks in advance!

    Bryan

    So what I want to do should work correctly according to the technical specifications . 5K monitors are way too expensive right now, so I think that will give Dell P2715Q 27 a shot.

    • At the same time supports the native resolution on the built-in display and up to two external displays 4096 by 2160 or a double-cable external 5120-by-2880
  • Tecra Z50 - A - 11 c: external display do not wake

    Hello

    I've got Tecra Z50 - A - 11 c and an external display connected to the VGA port.
    I implemented the plan of power management to turn off the screen after 10 minutes.

    The monitor turns off after 10 minutes of inactivity.
    The problem is that is not wake the mouse or a key.

    I have to restart the laptop to put the image on the external monitor.
    The internal display works fine.

    It seems to me like a BIOS problem, but I have the latest version of the BIOS.
    Any ideas?

    Thank you
    Jacek

    What happens if you press the function key (Fn + F5) to change the display output? This combination activates the external monitor again?
    Have you noticed the same problem using the hibernation, or "sleep" mode?

    I m not very good if it really a laptop before issuing.
    I mean the internal display still works fine and it would be advisable to check this problem using different external monitors.

    By the way: the laptop supports Intel HD Graphics 4400. Try to install the latest Intel GPU driver:
    https://Downloadcenter.Intel.com/SearchResult.aspx?lang=eng&ProdId=3719

  • detected external display suddenly stopped working - displays black screen

    original title: detected external display suddenly stopped working

    Hello

    I have searched in several forums, but have not been able to completely solve this problem.  It has been set provisionally and has not yet.
    This system I have:
    HP TouchSmart tx2 tablet pc with Windows Vista Service Pack 2 x 64-bit (Home Premium)
    AMD Turion (tm) X 2 Ultra Dual-Core Mobile ZM - 82, 2.2 GHz
    ATI Radeon HD 3200 graphics card
    I have been working for more than a year with a monitor flat screen Dell ST2310 external monitor and works very well with the setting "use external display only.  From one minute to the next two screen went black so I forced a restart and again the same problem.  I decided to manually disconnect the external monitor by unplugging the VGA cable from the laptop that turns on automatically to the main display as it would if I am disconnected display.  When I connected the VGA cable again the same question in the two screens were entirely black.  I unplugged once more the VGA cable if I could change the settings in Windows mobility.  I plugged back in the VGA cable after changing the settings of "external display only" to 'mirror' devices and after playing for a bit, with the Windows Mobility Center, I had the external display to work again my regular settings: "external display only.  This solution lasted a day and now works in the main screen and the external screen is completely black.
    I tried in vain to solutions:
    -Change VGA cables continues to experience the same issue.
    -Tested according to the specifications and Dell monitor Monitor works fine if the backlight is not the problem.
    -Records update for ATI Radeon HD 3200 graphics card and driver generic PnP Monitor and Dell ST2310.
    -Uninstalled ATI Catalyst Manager and re install now as AMD Vision Engine Control Center.
    -Checked AMD Vision Engine Control Center recognizes the connected external display.
    -Uninstalled the driver Dell ST2310 and re installed the driver.
    -On the screen settings have tried to extend the desktop on the external screen (second)
    Now, this is what's going on and don't know how to fix it:
    -Windows Mobility Center detects a monitor external, even when the VGA cable is disconnected.
    -When it detects the external display it sometimes detects it as DELL ST2310, sometimes as a generic Non - PnP monitor.
    -Sometimes under "Monitor" in the Device Manager, there are several monitors generic Non - PnP contained also the Dell ST2310 and generic PnP monitor.
    -When the external monitor is connected, the screen is completely black and does not work even after changing the settings Windows Mobility or Fn F4.
    Help!

    Hello
     
    I also suggest you to update the BIOS. Visit the manufacturer for more information.
    http://Windows.Microsoft.com/en-us/Windows-Vista/BIOS-frequently-asked-questions
     
    WARNING:
    BIOS change / semiconductor (CMOS) to complementary metal oxide settings can cause serious problems that may prevent your computer from starting properly. Microsoft cannot guarantee that problems resulting from the configuration of the BIOS/CMOS settings can be solved. Changes to settings are at your own risk.
     
    See also: http://h10010.www1.hp.com/ewfrf/wc/document?docname=c01881110&tmp_track_link=ot_recdoc/c00678157/en_us/c01881110/loc:4 & cc = us & dlc = en & lc = en & product = 352607 #N624
     
    Thank you

  • 'connect to a projector or an external display' not poping

    Hey guys im am trying to connect my HP Dv7 pc to my tv... I have enough advanced computer skills so I know its nothing to do with whatever it is affecting defult, having not not the correct drivers or... things that I was looking for the option 'connect to an external display or a projectror' when you click Customize , but for some reason that is not there... and even if I search I can't find it... someone knows why

    Hello

    1. don't you make changes to your computer before the problem?

    I suggest that you follow these steps and check if the problem persists.

    Step 1:

    Make SFC scan and check if the problem persists.

    Step 2:

    Test the issue in a new user account.

  • kernel_task runaway (from 300 to 600%) CPU with 2 external displays

    I have a MacBook Pro (retina, mid-2012), and for a year and a half, I've had episodes fighter during the kernel_task suddenly begin to consume all processor CPU (from 300 to 600%), is the response of the system so slow it is impossible to use.  I experience these episodes throughout the front 1-2 years that the machine went from Yosemite El Capitan and now Sierra.

    Normally, I use my MacBook with two external displays, both at work and at home.  At work, I have two external screens of Lenovo, and at home, I have two screens Apple (Apple Cinema Display 27-inch and 27-inch Apple Thunderbolt Display). I discovered that this kernel_task high CPU usage can only be stopped by disconnecting one of the external screens.  After unplugging an external display, the kernel_task subsides immediately to normal (< 5%).  After a few minutes, I can reconnect the 2nd external screen and proceed normally (sometimes for days, sometimes for hours, sometimes for a few minutes) until the kernel_task pulls up to 300-600% again.  The use of the high CPU kernel_task never happens unless I have two external displays connected.

    Note that since I upgraded to MacOS Sierra fugue kernel_task CPU frequency has increased considerably: of 1 kernel_task runaway every several days to a runaway almost every 10 minutes or so.   I don't have a reason this frequency has increased, but the runaway condition seems to have worsened by the fact that the photoanalysisd daemon is running like crazy on my grand (72 000) library of Photos.

    Also note that I started in recovery mode and have re-installed MacOS Sierra, and it has no effect on the runaway kernel_task.

    Any ideas on how to fix this resumption of kernel_task of all my CPU?

    I have attached my EtreCheck system report below.  This report was captured with two attached external displays.  At halfway while generating a report, the kicks and started kernel_task hogging CPU again.

    EtreCheck version: 3.0.5 (309)

    Report generated 2016-09-25 14:24:02

    Download EtreCheck from https://etrecheck.com

    Time 07:59

    Performance: Below average

    Click the [Support] links to help with non-Apple products.

    Click [details] for more information on this line.

    Problem: Computer is too slow

    Description:

    Sometimes, while working with my MacBook connected to two external displays, the kernel_task pulls up to 600 to 800% CPU and stays there until I unplug at least one of the external screens.  After disconnecting, the kernal_task subsides immediately to normal (< 5%).  After a few minutes, I can plug the 2nd external screen and proceed normally (sometimes for days, sometimes for hours, sometimes for a few minutes) until the kernel_task pulls up to 600 to 800% again.  The use of the high CPU kernel_task never happens unless I have two external displays connected.

    Hardware Information:

    MacBook Pro (retina, mid-2012)

    [Data sheet] - [User Guide] - [warranty & Service]

    MacBook Pro - model: MacBookPro10, 1

    1 2.6 GHz Intel Core i7 CPU: 4 strands

    16 GB RAM not extensible

    BANK 0/DIMM0

    OK 8 GB DDR3 1600 MHz

    BANK 1/DIMM0

    OK 8 GB DDR3 1600 MHz

    Bluetooth: Good - transfer/Airdrop2 taken in charge

    Wireless: en0: 802.11 a/b/g/n

    Battery: Health = Normal - Cycle count = 242

    Video information:

    Graphics Intel HD 4000

    NVIDIA GeForce GT 650M - VRAM: 1024 MB

    Color LCD 3840 x 2400

    LED Cinema Display 2560 x 1440

    Thunderbolt Display 2560 x 1440

    Software:

    macOS Sierra 10.12 (A 16, 323) - since the start time: about an hour

    Disc information:

    APPLE SSD SM512E Disk0: (500,28 GB) (Solid State - TRIM: Yes)

    EFI (disk0s1) < not mounted >: 210 MB

    Recovery HD (disk0s3) < not mounted > [recovery]: 650 MB

    Boromir (disk1) /: 499,05 (Go 140,24 free)

    Storage of carrots: disk0s2 499.42 GB Online

    USB information:

    Apple Inc. FaceTime HD camera (built-in)

    Apple Inc. Apple keyboard / Trackpad

    Apple Inc. BRCM20702 hub.

    Apple Inc. Bluetooth USB host controller.

    Apple Inc. Apple LED Cinema Display

    ISight Apple Display Inc.

    Apple Inc. Audio display

    Apple Inc. FaceTime HD camera (display)

    Apple Inc. Apple Thunderbolt Display

    Apple Inc. Audio display

    Lightning information:

    Apple Inc. Thunderbolt_bus.

    Thunderbolt Inc. Apple display.

    Configuration files:

    / etc/sudoers, 2299 but file size expected 1563

    Guardian:

    Mac App Store and identified developers

    Kernel extensions:

    / Applications/Beats Updater.app

    com.beatsbydre.BeatsDFUSupport [no charge] (2.1.0 - SDK 10.10 - 2015-10-29) [Support]

    /Applications/proxifier.app

    [no charge] com.initex.proxifier.macosx.kext (2.15.2b1 - SDK 10.7 - 2015-09-10) [Support]

    / System/Library/Extensions

    [no charge] com.makemkv.kext.daspi (1.5-2016-09-25) [Support]

    Startup items:

    TiVoDesktop: Path: / Library/StartupItems/TiVoDesktop

    Startup items are obsolete in OS X Yosemite

    Launch system officers:

    [no charge] 7 tasks Apple

    [loading] Apple 156 jobs

    [running] Apple 108 jobs

    Launch system demons:

    [loaded] com.apple.jetsamproperties.Mac.plist (2016-08-25) [Support]

    [no charge] 41 tasks of Apple

    [loading] 153 jobs Apple

    tasks of Apple 109 [performance]

    Launch officers:

    [cannot] com.adobe.ARMDCHelper.cc24aef4a1b90ed56a725c38014c95072f92651fb65e1bf9c8e43c37a2 3d420d.plist (2016-07-11) [Support]

    [loading] com.cisco.anyconnect.gui.plist (2014-06-10)

    com.DisplayLink.UserAgent.plist [no] (2012-08-14) [Support]

    [loading] com.google.keystone.agent.plist (2016-07-11) [Support]

    [loading] com.oracle.java.Java - Updater.plist (2013-01-04) [Support]

    Launch demons:

    [loading] com.adobe.ARMDC.Communicator.plist (2016-07-11) [Support]

    [loading] com.adobe.ARMDC.SMJobBlessHelper.plist (2016-07-11) [Support]

    [loading] com.adobe.fpsaud.plist (2016-08-29) [Support]

    com.backblaze.bzserv.plist [running] (2016-07-11) [Support]

    com.Cisco.anyconnect.vpnagentd.plist [running] (2014-06-10) [Support]

    com.DisplayLink.usbnivolistener.plist [no] (2012-08-14) [Support]

    [loading] com.google.keystone.daemon.plist (2016-09-09) [Support]

    [loading] com.oracle.java.Helper - Tool.plist (2013-01-04) [Support]

    [loading] com.sharpcast.xfsmond.plist (2013-11-30) [Support]

    User launch officers:

    com.backblaze.bzbmenu.plist [running] (2016-09-25) [Support]

    com.vladalexa.MagicPrefs.plist [running] (2016-09-25) [Support]

    Items in user login:

    iTunesHelper Application (/ Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)

    HWMonitor Application (/ Applications/HWMonitor.app)

    Hidden CPULed Application (/ Applications/CPULed.app)

    Application of hidden activity monitor (/ Applications/Utilities/Activity Monitor.app)

    Dropbox application (/ Applications/Dropbox.app)

    Hidden SizzlingKeys Application (/ Applications/SizzlingKeys.app)

    Beats Updater Application (/ Applications/bat Updater.app)

    Hidden NET Monitor Application (/ Applications/Net Monitor.app)

    Plug-ins Internet:

    FlashPlayer - 10.6: 23.0.0.162 - SDK 10.9 (2016-09-15) [Support]

    QuickTime Plugin: 7.7.3 (2016-09-13)

    AdobePDFViewerNPAPI: 15.017.20053 - SDK 10.11 (2016-08-03) [Support]

    AdobePDFViewer: 15.017.20053 - SDK 10.11 (2016-08-03) [Support]

    Flash Player: 23.0.0.162 - SDK 10.9 (2016-09-15) [Support]

    Silverlight: 5.1.20913.0 - SDK 10.6 (2014-03-07) [Support]

    JavaAppletPlugin: Java 8 update 101 build 13 (2016-08-18) check the version of

    User Plug-ins internet:

    WebEx64: SDK-1.0-10.10 (2016-01-23) [Support]

    Safari extensions:

    Ghostery - GHOSTERY, Inc. - https://www.ghostery.com/ (2016-03-15)

    3rd party preference panes:

    Backblaze backup (2016-07-11) [Support]

    Flash Player (2016-08-29) [Support]

    FUSE for OS X (OSXFUSE) (2013-11-30) [Support]

    Java (2016-08-18) [Support]

    MagicPrefs (2016-01-20) [Support]

    MenuMeters (2014-10-22) [Support]

    TiVo Desktop (2009-11-23) [Support]

    Time Machine:

    Skip system files: No.

    Mobile backups: OFF

    Automatic backup: YES

    Volumes to back up:

    Boromir: Disc size: 499,05 GB disc used: 358,81 GB

    Destinations:

    Frodo Time Machine [Local]

    Total size: 999,86 GB

    Total number of backups: 40

    An older backup: 09/09/16, 02:09

    Last backup: 25/09/16, 11:49

    Backup disk size: too small

    Backup size GB 999,86 < (disc 358,81 GB X 3)

    Top of page process CPU:

    345% kernel_task

    56% Information System

    44% cloudphotosd

    42% iTunesCacheExtension

    30% activity monitor

    Top of page process of memory:

    1.44 GB kernel_task

    1.18 GB com.apple.WebKit.WebContent (6)

    786 MB mds_stores

    590 MB bztransmit

    Mdworker (18) 492 MB

    Virtual memory information:

    256 MB of free RAM

    4 pm used GB RAM (5.96 GB being cached)

    768 KB used Swap

    Diagnostic information:

    25 sep, 2016, ~/Library/Logs/DiagnosticReports/com.apple.WebKit.WebContent_2016-09-25-134618_ 13:46:18 [redacted] .crash

    System/Library/Frameworks/WebKit.Framework/versions/A/XPCServices/com. Apple.We bKit.WebContent.xpc/Contents/MacOS/com.apple.WebKit.WebContent

    25 sep, 2016, 13:19:15 /Library/Logs/DiagnosticReports/photolibraryd_2016-09-25-131915_[redacted].cpu_ resource.diag [details]

    /System/Library/PrivateFrameworks/PhotoLibraryPrivate.Framework/versions/A/Supp ort/photolibraryd

    25 sep, 2016, 13:06:44 test - passed

    September 22, 2016, 16:03:11 ~/Library/Logs/DiagnosticReports/Microsoft Word_2016-09-22-160311_ [redacted] .crash

    com.microsoft.Word - Applications / Microsoft Office 2008/Microsoft Word Word.app/Contents/MacOS/Microsoft

    Start safe mode, use this way and see if the problem is recurring

  • External display on HDMI overheating my Mac and drains the battery badly

    Hey guys.

    I am using a MBP retina 2012 15 inches with an external monitor, a generic LCD 1080 p via HDMI without problems. And recently updated for Sierra.

    The question starts immediately when I plug it into the screen. The Macbook seems to overheat and run fans above 4000 rpm, which is very audible and boring. CPU and GPU temperatures go above 70 degrees C (normally they make 50 +). The battery holds for only 1.5 hours, generally works well for 4-5 hours.
    I tried killing all apps, followed a bad process in activity monitor, changing default resolution - nothing helps so far. The CPU is barely used by 10%, the memory pressure is fine.
    It's just that time when I plug the screen - Mac starts bad feeling. Never, the problem occurred on El Capitan. Maybe it's a GPU problem, but certainly caused by the OS.
    All the world had the same problem?

    Try resetting the NVRAM (hold down the command-option-P-R on startup).

    Also, try to restart in Mode without failure, then normally again.

    Finally, try logging into your account, sign in to a user account (or the guest account) and connect the external display. Same problem? If it works fine for a new account then it's something in your own account which is the cause - perhaps an element of connection or some other system changes induced by the operating system previous and who does not play nice with Sierra.

  • How to calibrate an external display for macOS Sierra?

    Hi guys,.

    seems that on my Macbook Pro after the update everything is strong and displayed correctly.

    However, on the external monitor, a 24 "AOC who was as crisp and sharp as the laptop (kind of I know) the images and the text seems to be well screwed. two attached photos to see the differences between the screens - even cannot correctly read the external monitor

    any ideas on how to solve this problem? or is irreparable? I tried to calibrate the monitor, used the old calibration profiles, etc. looks like illegible

    Thanks in advance

    Hello justme12,
    Thank you for using communities of Apple Support.

    If I understand your post that the quality of the image on the external monitor is as clear and crisp as it used to be. I understand wanting to the external monitor to be as clear as possible. I recommend using the steps in this article to help resolve this problem:

    Get help with graphical problems on external displays connected to your Mac.

    Best regards.

  • Scaling to external display

    I have a 2015 retina MacBook Pro with an external display k 4 (Asus PB287Q) and since the update for Sierra yesterday, I can select is more scaling "resolutions" which lie between 1920 x 1080 and 3840 x 2160. HD is far too big, far too small 4K. If you please, that there is a solution to this... I tried to restart, and it actually brought back the correct options until I closed the lid, and now they have disappeared and don't come back.

    That's what my display properties are similar (alt + click on Options):

    I had the same problem since the beta and still no word from apple. They completely borked seriously display drivers. I run dual monitors Dell P2715Q. A monitor allows me to choose the old scale with all the resolutions already supported 1080 p up to 4 k. 10.11 I could select the same resolutions on both monitors. Now I'm stuck with the resolutions that you mentioned on my second monitor. If I put my MBP to sleep and wake it up both monitors reflect the resolutions that show you without intermediate options between 1080 p and 4 k.

  • Question external display

    Hello

    I recently bought a henge dock and the external display for my MacBook Pro 15 "."

    The henge dock has a bolt of lightning from the macbook. My monitor has an extra display port and HDMI in, this looks a bit similar to HDMI. I'm looking for a cable to use thunderbolt out in the display on the external monitor port. I can find a few inexpensive options online, but I would go for quality rather than price and wonder what is the best solution in this case to HDMI.

    Thank you

    This cable should do the trick: http://www.apple.com/shop/product/HHLY2ZM/B/belkin-4k-mini-displayport-to-hdmi-c have-2-m-65-ft

    (In case you're wondering: the mini display plug in the thunderbolt port.)

  • My iMac screen went black, I use external display?

    MY iMac screen went out or black.

    Always a good hard drive.

    So can I use an external display to log off

    and wipe the hard drive for recycling.

    Thank you

    Yes. Here is the information on your model:

    Connection of the screen 1 mini DisplayPort
    Display modes Double view extended and copy video
    External resolution Up to 2560 x 1600 pixels

Maybe you are looking for