Thunderbolt Display turns off randomly

I got similar trouble. My MacBook Air was suddenly hung up, Then after few minute Thunderbolt Display became black out.

After that trouble I could still login my mac via SSH. WidowServer process with new firmware may have problem.

A setup was changed so that a computer nevert sleep as the tempraly solution. I hope this issue will fix soon.

I just experienced this while actively using my 2011 MBA with the display. The interesting thing is all peripherals connected continued to work and I could hear sound from the display. A reboot was necessary. I've turend on screen sharing so if it happens again I can test remotely if I can wake the display though system preferences Detect Display. The logs showed nothing.

Me, the same issue. Using Mac Mini Server 2011 dell 2311H monitor attached(upgraded RAM up to 8GB and is the only one change from original), finally got a Thunderbolt 27'' display two days ago. Then found 27'' Thunderbolt display would gone randomly even dell is perfectly ok at the same time (using dual display). Everything except 27'' Thun-di. I've been through this 3 times already during this morning. I just 'restart' my server ('this is a SERVER, jees..') and it corrected problem for the time being. No logs, nothing else helpful...

Waiting firmware upgrade, that's all i can do now... sigh...!

Well, i've just patched firmware update for Thunderbolt display from Apple customer support site. I'm sure you've done this already because it's dated 19, Sep. Well, I'll try to find the pattern anyway if the same thing happens again.

And, for your information, those happened while i was using 'Remote Desktop Connection' from MS-Office, which i set as expanded 'full screen', targeted Thun-di, (I've mentioned i'm using dual display, Dell 2311H and Thun-di above reply).

Plus, I found some interesting bug for the 'full screen feature' of RDC of MS-Office, which is sometimes got confusing which 'desktop' it should use. when i added one more desktop from 'Mission Control', ran RDC in full screen mode from 'desktop 2', it should just remained on 'desktop 2' when i switched to my original 'desktop 1'. But, when i did switch to 'desktop 1', RDC just switched to 'desktop 1' and remained in 'full screen mode'. I feel strange, 'cause the feature worked fine yesterday, but not today, and the 'Thun-di''s gone randomly.

Too many clues and multiple bugs appeared at the same time, made me confused, RDC of MS-Office, Lion, and Thun-di(oh, just added patch from Apple, TT)...

Wait for solution with fingers get crossed, haha...

Well, it's obvious 'this problem' was and is, irrelevant to this firmware patch.

I got no same turning off problem yet, though.

Still using dual, RDC of MS.

Let's see what happens next!

Good luck 2 U!

I'm seeing the same symptoms with a brand new display. Second day of use, connected to a MBA 13". No warning..screen just goes black, like someone pulled the power cord. MBA screen continues to work. I hear no fan noise at all nor do I feel moving air. This has happened twice in the 2 days I 've had the display. S/N is C02G88HBDJGR, if that means anything. How do I report this ?

I have the lastest Mac Mini Server: Hooked up the new Thunderbolt 27 display. There is no on off switch.

On plug in via the new Thunderbolt cable the screen came on. I ran the firmware updates as advised by Apple.

Now, the screen shuts off randomly. The screen is off right now.

The screen will not come back on unless I take out the cable and then re-insert. This technique brings the screen back to life.

Very odd.

Any fixes out there?

There are no fixes at this juncture. I have the exact configuration you do and have tried 10.7.2 beta and various cable combinations with the same result. The good news is that Apple is working on identifying the root cause and is doing so aggressively (I've spoken with customer support a couple of times). I am certain a fix will be out ASAP.

Apple tells me new screen is in order as this is not to occur. Call support and get new screen...mine went off a second time while I was speaking to tech...would not restart with the cable pull method.... A real hassle.

Correction would not restart without the cable pull method.... Cable pull restarted monitor...

Same here, the display worked for 5 minutes, then turnded black, got back for some 15 seconds and turned black again... Cable Pull DOES NOT restart the monitor. I can see the power plug is charging my macbook, but on the router my display ethernet port is not lit, same for USB connections to the display - they are not powered by the display!

The same thing has happened to me multiple times since I downloaded the firmware update. Today the monitor AND my macbook pro shut down because of this.

I am having this issue as well. Just received the thing. It turns off about 2 times an hour. The Apple web site does not even recognize the serial number.