Have you tried resetting the SMC - http://support.apple.com/kb/HT3964?
I had a problem similar to what you describe last week. The odd thing was that an SMC reset wouldn't 'take' when I was connected to the power from the 'octopus' cable. I had to use my 'real' MagSafe power adapter that I had in my bedroom to actually reset the SMC. Once reset, everything has been just fine.
Have you tried the 10.8.3 update? And check that you have all the firmware updates applied, for your Mac AND for the TB display? I know it sounds silly, but the Firmware update may need to be downloaded from the website
Thanks for the replies, yeah, I've tried both a SMC and a PRAM reset with no avail. Also have updated to 10.8.3 and have the newest firmware for TB display. I'm at a loss with this one because it works sometimes, then another day I'll sit down at my computer, plug her in and...nada! Sometimes I'll leave it plugged in and then 20 minutes later the display will pop on, but other times it's just not co-operating at all!
Also thanks Puma-IT, it's taken me many months to read through that thread!
I know it is a lonnnnnnngggg thread, but it sems to be a loooonnnnnnggggg standing issue
Any way, you may have some tips to try to fix your issue. Have you tried Apple Care, over the phone if your are still in your 90 days after purchase (or 1 year with an extended Apple Care Plan) ? Bringing the display and computer to an Apple Store or Apple Servcie Provider may be good: they are supposed to be the experts!
I did not want first, but then that's how I found out about the Thunderbolt Display firmware update, different from the computer firmware update. So it "costed" me two days without the computer, so if you have a break to plan regards,
Have a nice day and week!
I've had the same problem. The TB display worked beautifully for a week, then failed to activate when I connected, as normal, to the MacBook. Would take disconnecting the power, then reconnecting to boot it into action. This morphed into multiple attempts being required to it going. Finally, at the end of the second week nothing would goad it into action. Took it to the Genius Bar. They checked, determined the TB was faulty and replaced it with a new TB. The new device went through the same sequence of working well for ~1 week then periodic interrupts and failures, becomming more frequent until it finally stopped completely. It then came on briefly for one day after I installed Mavericks on the laptop, then failed again. All software updates are installed. Reset PRAM - nothing. Spent a couple hours on the phone with the Apple Support engineers, with them having remote access to my laptop - all looked good from their end on the virtual 2nd display, but still a black screen on the actual TB. Engineer thought it might be a problem with the laptop. Took the TB back to the Genius Bar, this time with my laptop also. Apple Store TBs worked fine with my laptop. Other Apple Store laptops failed to energize my TB. Ergo my TB had the problem. Just returned home with another replacement new TB. Now plan to check the electric supply, surge protector, APC and wall outlet before plugging in the new TB, although 2 of my colleagues have been using their TBs for several months on the same electric supply without incident. From the posts here this appears to be a larger issue with several users experiencing the identical problem. Is it one specific batch run of TBs that has a faulty component? The Genius Bar guy thought it is most likely to a one or more capacitors associated with the TB power supply. Hoping it's third time lucky, or I'll be back with a new post in a couple of weeks. Would be nice if Apple would solve this and let us know what's going on.
Grr, still having this problem, I have tried everthing I can think of, it's so frustrating because it'll work fine for a few weeks then go back to being tempremental. One thing I have noticed today in my annoyed efforts to fathom this...If I plug my iphone charger into the back of the TBD, the phone will charge, but the secondI plug in the thunderbolt cable to my MBP, it'll stop charging immediately. I'm stumped...And it's not quite as easy taking a thunderbolt display to the Apple Store like it is a phone or laptop...
I have been reading all the posts regarding these similar issues as I had been encountering. My specific issues have been:
- Slight flickering and then going blank/black. USB & Thunderbolt devices connected all worked fine after blanking screen
- Turning on from stand by, blank screen
- Just going blank when it felt like it
The use of the screen/thunderbolt was my first thought. Tried many things i.e. not using it but having it on, watching videos, general light use etc - all circumstances resulted in inconsistent results (sometimes would go blank, sometimes not) So, what have I tried to resolve the issue:
- Different cables, new cables, not using the built in cable - Blank screen in all attempts - Again all random with various time periods before it went blank
- Different Mac - I mainly use it with a Mid 2011 iMac 27" - Tried my MacBook Pro - happened in just the same way
- Tried all various of the above Mac/cable, not having devices connected, different power strips (I even stood on one foot for a while but it still went blank)
I finally bit the bullet, and booked into to the 'Genius' bar. As soon as I did (appointment was set for 4 days time) the screen stopped going blank. It was just worked, day in. It got to the day of the appointment and I thought, sod it, not going. 1 hour past the appointment (which I missed) the bloody screen goes blank.
The screen had been going blank on and off for 2-3 months (I had a dev release of Yosemite). When it went blank, I could always get it back with unplugging it and leaving it for 5mins. After I missed the appointment with Apple, the screen started taking longer and longer to come back to a working state e.g. 3 or 4 hours.
Bare with me, you'll love the ending!!
So, after 8 hours of it not working even after reboots, pram & smc resets etc I resorted to mading another booking with Apple. I carefully packed it up and took it along with my MBP. Low and behold - It was bloody working and didn't go blank at all (Obviously it didn't want to look bad in the store!!). Anyway, they took it in for testing and further investigation.
2 days later I had a call, saying they had got it to blow, and that they thought it might be the logic board or the LCD panel. They proceeded to replace both these components 2-3 days later after ordering then in. I then had a phone call saying the items that they had put in were not working (Something about the pins not aligned under the microscope). They had to order a new logic board and LCD panel. After a long wait and numerous conversations, they completed the repair.
I have just picked up the screen for Apple - All working!!
How old was my display? Oct 2011 - I think, so just under 3 1/2 years old. Now comes the fun part.
Due to EU consumer law, A product of this nature should last up to 6 years. Therefore I have a nearly new thunderbolt display that, touch wood, will not go blank..... And it cost me nada!
Contact me if you want anymore info.
Suddenly solved my Thunderbolt Display problem with waking up. All of these tips in thread does not help me. In my case I just set screen of my laptop as a primary display (where is login window is appearing each time after booting). No problems since last Monday (week). Another proble was with device, that connected to USB port in ThunderBolt Display. Disconnecting of this device solve crashing issues on startup.
So, my Thunderbolt Display waking up every day and is not crashing on startup ! Yay!