27" thunderbolt monitor is not powering back on with Laptop

Since updating to the new version of Yosemite my 27" thunderbolt monitor is not powering back on when plugged into my laptop via the thunderbolt port. Suggestions on how to get it back up?

Apple Support had me reset the SMC and after doing so my monitor came back up and functioned like it was supposed to. Support said sometimes after updates we need to reset the SMC if changes aren’t cleared from the previous update resulting in behaviors like I was experiencing. Below are the steps i followed to reset the SMC.....
1. Shut down the computer. 
2 Plug in the MagSafe or USB-C power adapter to a power source and to your computer. 
3 On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time. 
4 Release all the keys and the power button at the same time. 
5 Press the power button to turn on the computer. 
On MagSafe power adapters, the LED might change states or temporarily turn off when you reset the SMC.

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My new macbook air and new thunderbolt monitor will not work together. the keyboard will not engage and the monitor screen keeps going black. is it a problem with the monitor, connection, laptop?

my new macbook air and new thunderbolt monitor will not work together. the keyboard will not engage and the monitor screen keeps going black. is it a problem with the monitor, connection, laptop?

A new Mac comes with 90 days of free tech support from AppleCare.
AppleCare: 1-800-275-2273
Call AppleCare. They will help you.
Best.

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Please explain.
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ASA5510 sla monitor does not fail back

I've been down this path before and never got a resolution to this issue.
ASA5510 Security Plus
Primary ISP conn is Comcast cable
Secondary ISP conn is fract T1
I duplicated the SLA code from http://www.cisco.com/en/US/partner/products/hw/vpndevc/ps2030/products_configuration_example09186a00806e880b.shtml
When I pull the conn from primary ISP the default route to the secondary comes up
When I reconnect the primary the default route to the secondary does not go away.
I must either reload the ASA or remove/readd the two default outside routes.
Anyone have this same experience and could lend a hand?
Are there any commands I might have in my config that break SLA?
If so I would have hoped either the Configuration Guide or Command Reference for 8.2 would say so, but I don't see any mentioned.
I'm working remotely with my customer so I can't play with this except on off-hours.
ASA running 8.2(2) so as to use AnyConnect Essentials.
Thx,
Phil

Pls. read and try the workaround.
CSCtc16148 SLA monitor fails to fail back when ip verify reverse is applied
Symptom:
Route Tracking may fail to fail back to the primary link/route when restored.
Conditions:
SLA monitor must configured along with ip verify reverse path on the tracked interface.
Workaround:
1. Remove ip verify reverse path off of the tracked interface
or
2. add a static route to the SLA target out the primary tracked interface.
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-KS

Z87-G41 pc mate : monitor does not come back on after wakeup

Everytime the computer goes to sleep and wakes up, the monitor does not come on. I can shut it off and turn it back on and the desktop will flash, then goes black again. Just started doing this last week. I updated all drivers and this did not help either. I am running Win 7 Ultimate 32 bit. I have had this MOBO since last March with no problems. Any ideas?

>>Posting Guide<<
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My thunderbolt screen is not sharp when connected with my airbook, my thunderbolt screen is not sharp when connected with my air book

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If running 10.7 or later hold down Command-R at Startup.
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My Iphone does not want to charge with laptop. What can I do?

Hello,
Last August I bought Iphone 4S and i am currently in another country for the summer and I wont be back until september which meqns my 1 year waranty is over and my Iphone is expreincing problems with speker sound and it wont charge with laptop. I am afraid that if I go to a local apple store they wont accept the Iphone due to the waranty. So what can I do? please help and thank you.

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HP w1907 Monitor - will not come back after computer goes to sleep

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My iphone 3gs has completley turned off and will not switch back on with a full battery.

my iphone 3gs has completley turned off. it is fully charged but will not switch on. i have connected it to itunes and it is not recognising the device. i have tried to reset it and this will not work either, and i have tried to restore it by holding down the home button but the apple sign will not come on. i dont know what else to try, any ideas?

Try here. iPhone and iPod touch: Frozen and unresponsive

Thunderbolt Monitor causing severe lag in FCPX 10.1.2 - Help!

So, I have been using final cut X for a while with a 2012 Retina MBP connected to a thunderbolt G-raid and the apple thunderbolt monitor. I have had sevre lag and beach balling in FCPX every single time its plugged into my thunerbolt monitor - however when the laptop is no connected FCPX runs much much smoother.
I obviously would like to use my 27inch amazing thunderbolt monitor and not have to settle for something else - unless there is something that is better at this resolution for editing?
Help!!!!

Are you connecting the Thunderbolt display to the Mac to use for mirroring or are you only use the Thunderbolt display for FCPX editing?
I don't use mirroring on purpose as it tends to slow OS X down a bit.
Also, this way you are not powering the Mac and Thunderbolt display at the same time. I use the adapter that came with my MB Air for that.
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Functioning Monitor will not display with Mac Mini

I'm trying to get an IBM E74 CRT monitor working with an early 2009 Mac Mini. I have it connected with Apple's mini-DVI to VGA adapater. The Mac "sees" the monitor since with screen sharing I can see the Display System Preference when the monitor is attached. It shows the monitor as an IBM E74 and allows what appear to be appropriate choices as far as resolution and refresh rate are concerned. I tried many combinations of resolution and refresh rate with no difference in behavior.
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The monitor despite its' age has pretty low time on it and is quite serviceable. Are there quirks with the VGA interface that we may be running into? I would like to get this combo working together if at all possible.

I would say the VGA interface did evolve somewhat over that time period. In particular, the thing that may have changed that could be the underlying cause of the problem is sync termination impedance has trended upwards. It's not unusual to find older monitors with low impedance on sync. Some even had 75 ohm impedance, which required a line driver for sync the same as for video.
It could be the IBM monitor has fairly low termination impedance and the mini is unable to provide sufficient output on the sync lines to drive TTL levels, whereas the MBP is doing better. You could check this with a simple ohm meter with the IBM monitor turned off. Ideally, for the mini, you would want to see a high impedance reading on H and V sync, like close to 2k ohms. If it's 500 ohms or less, then the mini may not be able to drive sync properly.
On an old monitor like that, it is likely to have old fashioned components with axial leads rather than surface mount components. If you are handy with a soldering iron, you could find the offending resistors and bring the monitor up to a more modern, high impedance standard of 1.8k to 2.2k.

Thunderbolt monitor volume is low

I don't know what is going on, but my volume is fine on my MacBook Pro, but suddenly the volume on my Thunderbolt Monitor is not very loud, not matter what I do. I have verified in Sound that Output Volume is at Max for Diplay Audio. I have been to Audio Midi Setup and the bottom two sliders are at Maximum.
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I just experienced this problem, and it was fixed by plugging in the usb cord from the display to the computer.

Monitor not powering on

I have a w2072a hp monitor which Is now not powering on and the led too doesnt work .recently I changed an option on the osd,the connectivity option from vga to dvi now its not powering on plss help me

Apple Support had me reset the SMC and after doing so my monitor came back up and functioned like it was supposed to. Support said sometimes after updates we need to reset the SMC if changes aren’t cleared from the previous update resulting in behaviors like I was experiencing. Below are the steps i followed to reset the SMC.....
1. Shut down the computer. 
2 Plug in the MagSafe or USB-C power adapter to a power source and to your computer. 
3 On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time. 
4 Release all the keys and the power button at the same time. 
5 Press the power button to turn on the computer. 
On MagSafe power adapters, the LED might change states or temporarily turn off when you reset the SMC.

My Thunderbolt-port equipped 15" Macbook Pro (Early 2011) works with other monitors but not with my Thunderbolt Display.

I just got a thunderbolt monitor and excitedly, I plugged my early 2011 thunderbolt port equipped 15" Macbook Pro (running 10.8.2) into it and... no image on the monitor.
Ok, so I know that the TB display works because I plugged a mid-2012 13" Macbook Pro into it (running 10.7.5) and it works perfectly. In fact, I'm using it to type this message right now.
Other details:
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see my conundrum?

It should just work - if it's not working with your 2011 model (works just fine with my 15" late 2011, right out of the box) I would get in touch with AppleCare as soon as possible and see what the senior techs may have to say...
Clinton

Have most recent macbook pro connected to thunderbolt via thunderbolt cable. Occasionally when I close my laptop the thunderbolt display goes black and does not come back on---even in response to keyboard. Help

Have most recent macbook pro connected to thunderbolt via thunderbolt cable. Occasionally when I close my laptop the thunderbolt display goes black and does not come back on---even in response to keyboard. Help

Hello QuinnDev,
Thank you for posting in the Apple Support Communities. It sounds like you are trying to use your MacBook Pro with a Thunderbolt Display in closed clamshell mode (MacBook Pro closed), but sometimes the display doesn't stay on. I found an article that talks about closed clamshell mode. You would have to fulfill the following requirements to use your display this way:
Requirements for closed display mode:
Power adapter
External keyboard, mouse, or trackpad
External display
You can find all the steps and the full article here:
Mac notebooks: How to use your computer in closed clamshell (display closed) mode with an external display
http://support.apple.com/kb/HT3131
I hope this helps!
All the best,
Sheila M.

27" thunderbolt monitor is not powering back on with Laptop

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