Results 1 to 8 of 8
  1. #1
    Thunderbolt Display problems
    Hello everyone,

    First post here so please be nice

    Having a slight issue with my Thunderbolt display.

    I've tried resetting everything i've found online but no luck.

    Tried it with a thunderbolt cable & getting the same result, so it's not the built in cable.


    Upon plugging it in, both my MacBook pro's screen & the thunderbolt screen flicker on and off repeatedly until i unplug it.

    As if the displays connecting and disconnecting.


    Has any one come across this before?

    I'm more than happy to open up the screen and investigate, but a point in the right direction as to what i'm looking for to test would be appreciated

  2. #2
    Thunderbolt Display problems
    ferrarr's Avatar
    Member Since
    May 21, 2012
    Location
    Pawtucket, RI, US
    Posts
    5,149
    Your Mac's Specs
    L2014 Mac mini macOS Mojave, iPhone 8+ iOS 12, 12.9" iPad Pro 1 iOS 12, Pencil 1
    Device specifics for each device?

    MBP?

    Display?
    -- Bob --
    Please backup. Everything has a life cycle, unexpected and warning free. Nothing will last as long as you want it to.

  3. #3
    Quote Originally Posted by ferrarr View Post
    Device specifics for each device?

    MBP?

    Display?
    Screenshot 2018-10-23 at 11.34.13.png

    The display is an Apple LED Cinema Display 27"

    The one with just the magsafe & thunderbolt.

    I can't get any more info from it currently.

    It does it attached to any MacBook Pro, Mac Pro or Mac Mini that i've plugged into it.

  4. #4
    Thunderbolt Display problems
    ferrarr's Avatar
    Member Since
    May 21, 2012
    Location
    Pawtucket, RI, US
    Posts
    5,149
    Your Mac's Specs
    L2014 Mac mini macOS Mojave, iPhone 8+ iOS 12, 12.9" iPad Pro 1 iOS 12, Pencil 1
    Thanks for that info.

    I would start with an SMC reset, https://support.apple.com/en-us/HT201295. You may want to do it twice.

    Maybe the NVRAM reset will help also, https://support.apple.com/en-us/HT204063?
    -- Bob --
    Please backup. Everything has a life cycle, unexpected and warning free. Nothing will last as long as you want it to.

  5. #5
    Quote Originally Posted by ferrarr View Post
    Thanks for that info.

    I would start with an SMC reset, https://support.apple.com/en-us/HT201295. You may want to do it twice.

    Maybe the NVRAM reset will help also, https://support.apple.com/en-us/HT204063?
    Tried these already.

    The MacBooks connects fine to other displays.....

  6. #6
    Thunderbolt Display problems
    ferrarr's Avatar
    Member Since
    May 21, 2012
    Location
    Pawtucket, RI, US
    Posts
    5,149
    Your Mac's Specs
    L2014 Mac mini macOS Mojave, iPhone 8+ iOS 12, 12.9" iPad Pro 1 iOS 12, Pencil 1
    Quote Originally Posted by pasjake View Post
    Tried these already.

    The MacBooks connects fine to other displays.....
    So, the display does NOT work with any Mac you have connected it to, AND the MBP DOES work, with other monitors you have connected to it? If so, it sounds like the monitor is dead to me?
    -- Bob --
    Please backup. Everything has a life cycle, unexpected and warning free. Nothing will last as long as you want it to.

  7. #7
    Quote Originally Posted by ferrarr View Post
    So, the display does NOT work with any Mac you have connected it to, AND the MBP DOES work, with other monitors you have connected to it? If so, it sounds like the monitor is dead to me?
    My MacBook Pro is fine, as is the Mac mini & the Mac Pro that Iíve tried testing said screen with.

    All above mentioned units work with other screens with no issue.

    The issue is the screen.

    Iíve tried the factory fitted thunder bolt cable, and a thunderbolt cable connected to the thunderbolt port on the screen with the same flicker results.

    When the flicker happens it makes the Macintosh in useable.

    When the initial fault appeared it was purely from moving the angle of the display.

    What Iím trying to determine is whether itís a potential PSU fault or logic board fault. Or as simple as a nicked wire. (Due to the movement causing it)

    As previously said, I am more than happy and equipped to open up the display and have a look at whatís going on, along with component level repair. I was merely asking for a point in direction as to what to look for, or if there was any common reason for this outcome.

  8. #8
    Thunderbolt Display problems
    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Keller, Texas
    Posts
    56,599
    Your Mac's Specs
    2017 27" iMac, 10.5" iPad Pro, iPhone 6s+, iPhone 7+, Numerous iPods, Mojave
    Flicker on those Apple TB displays can be caused by either bad cabling or the connection itself. And yes, it could be something internal. If you're okay with opening up the TB display and checking it out, you can find the instructions at iFixit: The Free Repair Manual. I would try new cables first and check the connector on the back of the display.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Thunderbolt port of thunderbolt display bend
    By kelly135 in forum Apple Desktops
    Replies: 2
    Last Post: 11-29-2016, 02:34 PM
  2. Thunderbolt Display Problems
    By tk0117 in forum Other Hardware and Peripherals
    Replies: 6
    Last Post: 03-27-2015, 06:29 AM
  3. Thunderbolt Display?
    By Gabry777 in forum Other Hardware and Peripherals
    Replies: 1
    Last Post: 12-03-2012, 10:12 AM
  4. new thunderbolt display?
    By geeeek in forum Other Hardware and Peripherals
    Replies: 5
    Last Post: 06-21-2012, 06:59 AM
  5. Thunderbolt display outputs
    By AnthonyH in forum Other Hardware and Peripherals
    Replies: 3
    Last Post: 09-28-2011, 06:42 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •