Thunderbolt Display turns off randomly

I have had it later on at Apple Service and they've changed motherboard and power supply and nada.

then they've changed LCD Panel and is now working.

So at the end was LCD panel itself faulty - after 3 years 😟

I'm having this same issue on a brand new TBD and rMBP 15" (like bought within the last week).

Randomly I will see the TBD go black, then it will come back and I'll have the display, but my USB ports will stop working. I originally thought it was an issue caused with an Aune T1 USB DAC/Amp I was using, so I disconnected it. Then I thought it might be Steermouse for my G400s, so I uninstalled it and rebooted. Unfortunately that doesn't appear to have resolved the issue. It's very intermittent, but nonetheless is happening.

My hardware details are below:

Hardware Overview:

Model Name: MacBook Pro

Model Identifier: MacBookPro11,2

Processor Name: Intel Core i7

Processor Speed: 2.2 GHz

Number of Processors: 1

Total Number of Cores: 4

L2 Cache (per Core): 256 KB

L3 Cache: 6 MB

Memory: 16 GB

Boot ROM Version: MBP112.0138.B07

SMC Version (system): 2.18f10

System Version: OS X 10.9.5 (13F34)

Kernel Version: Darwin 13.4.0

Boot Volume: Macintosh HD

Boot Mode: Normal

Thunderbolt Display:

Vendor Name: Apple Inc.

Device Name: Thunderbolt Display

Vendor ID: 0x1

Device ID: 0x8002

Device Revision: 0x1

UID: 0x0001000000000000

Route String: 1

Firmware Version: 26.2

Port (Upstream):

Status: Device connected

Link Status: 0x2

Port Micro Firmware Version: 2.0.7

Cable Firmware Version: 0.1.18

Cable Serial Number: C4M431400MFDNWFAZ

Port:

Status: No device connected

Link Status: 0x7

Port Micro Firmware Version: 2.0.7

From what I've seen in this ~30 page thread is that it appears most people have attributed the issue to a faulty All-in-One TB cable off the TBD and that replacing this with an external 3rd-party (OWC or other) TB cable fixes the issue. I'm going to try that to see if it resolves the problem, but as an interesting point on this almost every one of my coworkers with a similar configuration has the same exact issue, except for those using older (non-Retina) MBPs which seem to have no problem with their TBDs.

I'm pretty surprised that this issue has persisted more than 3 years considering the cost of a MBP + TBD is >$3000. It's beyond ridiculous this has not been resolved at this point.

I am having exactly the same problem, I fixed it by using my MBP laptop charger instead of using the magsafe from TBD and its working fine ever-since, so I think its something has to do with the power source of the TBD.

I am having exactly the same problem, I fixed it by using my MBP laptop charger instead of using the magsafe from TBD and its working fine ever-since, so I think its something has to do with the power source of the TBD.

I will try that as well. My new 2m Thunderbolt Cable from Apple arrived today, so I am going to try what other's suggested and not use the all-in-one Thunderbolt connector and see if the behavior still occurs first.

The problem totally disappeared after installing the latest OS Version Yosemite. I am now a happy user 🙂

http://www.macrumors.com/2014/11/13/thunderbolt-display-firmware-update/

Has this update helped anyone? My TBD is black for 3 weeks now. Cant work anymore, and I already said my goodbyes. Tried it out with this firmware update, but of course, it is still plain black. Even with 3rd party tb connector.

So I'm finally giving up. Already bought a Dell monitor, and not even considering buying another monitor from apple.

You guys see the new Thunderbolt Display firmware update 1.2 that just came out?!?!?

I installed firmware 1.2, but the display still turns black.

Same as mine...

I also installed the new Thunderbolt Display firmware update 1.2, and it has had no effect, screens (I have two TBD's connected) still flicker and occasionally shut off requiring a disconnect/reconnect. I also tried a 2m Thunderbolt cable from Apple, also with no effect.

Interestingly, the system profiler showed the Firmware version of my displays 26.2 before and after the update. So it's possible the update didn't even do anything, although, trying to run it again says all displays are already up to date. I didn't notice what the port or cable firmware versions were before the update, so it's possible they've changed...

As others. Nothing has changed since firmware update. 2 TBD displays still flicker, alternately. New MacPro. New TBDs.

I used my Thunderbolt Display from day one with the external 2 meter cable, connected to a Mac Mini. Some weeks ago, my display began suffering from the exact same problems described in this thread. These problems (blinking and black screen) disappeared by connecting with the built-in cable. Two weeks ago, I bought a new 2 meter Thunderbolt cable from Apple, this time a black one, to make sure it contains the newest firmware. Since then all problems I had with my Thunderbolt Display disappeared, including other ones like awaking from sleep modus.

Long story short: always try a new Thunderbolt cable before taking the conclusion that your display needs to be repaired!

My two TBDisplays are still doing the non wakeeee.........wakeee routine. I've spent hours on the phone or online doing tweaks and reboots of software, hardware, settings, re-installation of Mavericks to no avail. The last correspondence I had with my senior tech was to return both of my TBDs for a full refund. I haven't heard from him since and he doesn't respond to my emails anymore. This is really starting to **** me off. I spent two grand on these displays and they won't do what they were supposed to do. That includes being a thunderbolt hub and usb port hub. Whenever the particular TBD decides to not work, it ejects whatever I have connected to the usb hub and the Thunderbolt port. Why do I have to live with this? Apple tell me why please!

Here's a screen shot of my thunderbolt port info with display info. Does anyone who has done the firmware update have different version numbers than mine?

Thunderbolt Display:

Vendor Name: Apple Inc.

Device Name: Thunderbolt Display

Vendor ID: 0x1

Device ID: 0x8002

Device Revision: 0x1

UID: 0x00010001009AA5C0

Route String: 3

Firmware Version: 26.2

Port (Upstream):

Status: Device connected

Link Status: 0x2

Port Micro Firmware Version: 2.0.7

Cable Firmware Version: 0.1.18

Cable Serial Number: C4M332400GEDNWFAF

Port:

Status: Device connected

Link Status: 0x2

Port Micro Firmware Version: 2.0.7

Cable Firmware Version: 0.1.18

Cable Serial Number: C4M3437001UDNWFA5

Thunderbolt Display:

Vendor Name: Apple Inc.

Device Name: Thunderbolt Display

Vendor ID: 0x1

Device ID: 0x8002

Device Revision: 0x1

UID: 0x000100010079DA80

Route String: 303

Firmware Version: 26.2

Port (Upstream):

Status: Device connected

Link Status: 0x2

Port Micro Firmware Version: 2.0.7

Cable Firmware Version: 0.1.18

Cable Serial Number: C4M3437001UDNWFA5

Port:

Status: No device connected

Link Status: 0x7

Port Micro Firmware Version: 2.0.7