Thunderbolt Display turns off randomly

Great News for me.

The new monitor apple sent me works and so far at least has not shut itself off or gone black.

Apple support, all very helpful.

Unbelievably, the new second monitor required a pram and system management reset to allow the brightness bar in display settings to appear and to make use of the USB ports and make them start to function on the back of the Thunderbolt. On first plug in the USB ports did not work.

I am now of the impression certain of these units were some how defective but the replacements are fine. We will see.

The first and older screen did work after some tinkering as already described but only if I did not make use of the USB plugs on it. Use of USB plugs on my first older model still caused blackouts.

I hope this info helps others.

Let's all hope the new one stays on.

That's great news. Did you also update to the latest System/Firmware?

While keeping a log about the random blackouts, I experienced a new 'symptom'.

Every other time I put the display to sleep manually (ctrl.+ shift + eject), it goes dark, but the backlight stays on. It cannot be woken again by pressing any keys. It has to be unplugged in order to work again.

@

AlohaSpirit2

Please give a status updates, if (when? 😉 ) those blackouts occur again.

Help! I am having a multiple blackout attack. This morning my TB keeps switching on and off. It has happened about 6 times in the past 15 minutes. Very hard to work this way. It seems to be subsiding in that the time between blackouts is getting longer.

I am running a MBA + TB, and I use "extended" or dual-screen mode, as opposed to "duplicate mode."

Apple Support has reached out and asked me to do a "capture."

Crossing my fingers that it gets resolved soon.

After reading all the posting and I am on the 2nd TB monitor, which was provided to me by Apple as a replacement. The 2nd TB monitor slightly improved, but black out continues to occur daily. Once a day is something that I have to live with for now. When I was at Apple Store, the staff told me that they had found a software solution. However, it has been two weeks, and we have not seen any new patch to cover the problem. From my experience I guess the problem is mostly related to hardware design. Software fix if achieveable will likely put some limitations on the montior performance or functionality so to avoid the problem area(s). This problem may become a financial burden for Apple, who may have to recall all defected units or have to deal with legal issues brought up by customers. We need to keep our eyes on how the issue is developed until it is resolved. Afte all, $999 is not a small sum. We need to make sure that the monitor's standard warranty is exteneded so when a solution is deviced and we are still covered with the fix, recall, or patch.

More good news for me. My replacement monitor has not blacked out for 24 hours now since coming out of box.

To me, this means blackouts must be hardware. Sure, maybe software can help...not sure but this new monitor has not blacked out yet.

FYI., the USB on monitor does work, but I am not using it.

I am using Pegaus Thunderbolt wire and connection on monitor.

Hope this helps.

Ouch....No sooner than I write this letter and my monitor blacks. Out!

This really *****...

Monitor connected direct to Mac Mini Server. Pegasus connected to back of monitor.

Suggestion?

Kind Sir,

Please explain where auto brightness box is and how I get there....step by step please.

Also, if able to, please post other thread you are reading. I've not located other threads to this issue.

Thanks.

Call Apple, people! The more people report this problem, the more Apple realizes that this a huge issue to be resolved!

Why doesn't Macrumors or other big sites write about this? There must be thousands of reported cases all over the net.

And not using a port or check/uncheck stuff in the prefs isn't a solution! Customers paying good money for this thing, so they want at least gadgets that work smoothly.

Okay, unbelievably that box and the brightness bar disappear on mine...until I reboot the Mac Mini server. After reboot box and brightness bar appear.

I am testing out unchecking that box.

What is going on here?

Are these defects or what?