Thunderbolt display won't power up at all

Hi I recently purchased a new 2.5ghz i5 mac mini and a thunderbolt display and when i plugged it all in the display wont power up all. Tried the hdmi connection on my hdtv and it worked fine. Tried a display port to hdmi adapter in the thunderbolt port to my hdtv and that worked fine. updated the mini to the latest software, checked all the cables, reset the pram still can't get it to power up. Am i missing something? There is no power button on the display that i can see, from what i understand it is supposed to come on when the mac powers up. For all the people that own a working thunderbolt display when going does it make any kind of noise or anything that you can tell that it is going, apart from a picture being on the screen. Because mine is seems to be dead doesnt make a sound, screen is blank. So far its a worthless piece of junk & i'm 3hrs away from the nearest apple store to get a replacement or get it fixed. Really starting to wonder about purchasing anything apple, just have one problem after another, first it was the apple wireless keyboard not pairing with lion os now this. Any help appreciated

I suppose the TB cable could have gone bad. If you get a another TB cable and plug it in from your MBP to the TB port of the display and see what happens. If it powers up and all ports work then it means the built in cable is bad. If nothing happens means the TBD is dead and will require repair.

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Thunderbolt Display won't power up

So I have a Thunderbolt Display that I bought on eBay , trying to set up as my second monitor. The glass was broken, and I replaced it. Seemed great, I was using it last night daisy chained from my other TB display.
However, when I looked this morning, the second monitor would not power up. I tried connecting directly to my mbp, still no dice. I haves couple of USB dongles that typically light up when I plug them into the back of my other monitor, but they don't light up when I plug them into this one anymore.
I did mistakenly plug in a fw800 cable into the Ethernet port, but I don't imagine that I did any damage, since the FW cable housing is plastic, so I don't think it could have shorted out anyof the Ethernet pins.
Any ideas what could have happened overnight? Does this sound like a power thing maybe? Wiggling the TB connector doesn't seen to have any effect.
Thanks in advance for your help!
Geoff

I suppose the TB cable could have gone bad. If you get a another TB cable and plug it in from your MBP to the TB port of the display and see what happens. If it powers up and all ports work then it means the built in cable is bad. If nothing happens means the TBD is dead and will require repair.

Imac display won't power up or stay on when it does

imac display won't power up or stay on when it does

Have you checked the Energy Saver settings? System Preferences / Energy Saver.
If the settings are what you want, you can try this. Change them to anything at all then change them back to what you want. The restart the computer and reset the PRAM.
Shut down your Mac.
Locate the following keys on the keyboard: Command (⌘), Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

My iphone would randomly power up and down after latest software update. now won't power on at all.

Anybody know why my iphone 5 would randomly power up and down after the lastest software upgrade, and now today, won't power on at all? the screen is now randomly showing the apple icon, but won't power on. This a fairly new phone. Any feedback is appreciated.

Try this:
Settings>General>Accessibility>Reduce Motion>On
My software upgrade set this to off.
Hope it works.

IPhone 3GS, won't power on at all.

Hi,
earlier today, when I plugged my phone in to charge, it started with the usual symbol for charging, from a flat battery, then after having to step away for a short while, I pressed the on button and a white screen would appear, no icons etc.
I tried to do a restore, but with ios4 now out it insisted on that being installed, and it failed, there was an error message with a code, but it came and went to quickly, and now it won't power on at all.
Any ideas.

Good news, after searching the support section, and finding these http://www.apple.com/support/iphone/assistant/phone/#section_2 instructions about restarting, that got it back to the normal screen.
I wasn't planning to update the software straight away, but since I've got it now...

I have 2 macbooks, and my thunderbolt display won't work on one. HELP!

I have to Macbook Pros. The one for my work is connected to my Thunderbolt. When I tried to connect my personal one to watch a movie, it won't connect. I tried "detect displays" and "gather displays" - nothing.
HELP!!
Dana

Welcome to the Apple Support Communities
Note that the Thunderbolt Display can only work with Macs with Thunderbolt ports (Early 2011 and newer MacBook Pro). If your Mac is older, it won't connect to this display.
To check what MacBook Pro you have, see > http://support.apple.com/kb/ht4132 If you have a Mid 2010 or older MacBook Pro, you can't use it with your Thunderbolt Display

Macbook pro and Thunderbolt display on battery power no go.

I use my macbook pro mainly on my desk with the thunderbolt display and its lid closed. While having the power adapter connected to the macbook everything works fine. When I disconnect the power adaptor and try to wake up the computer it comes to life for a few seconds and then goes back to sleep for good. I cannot use the thunderbolt display while having the macbook on battery power. That causes the issue of the battery not discharging which I am aware is pretty bad. Any advice is welcome. Thanks.

I kind of figured this out. The reason I wasn't satisfied was that without the power adaptor when you hit a button on the keyboard the monitor actually wakes up the computer, works fine for a few seconds and then puts the computer to sleep. That kind of proves that it does work, technically at least. The problem is going into sleep mode afterwards.
Anyway i guess it just doesnt work. Thanks.
ps. If there is a way of discharging the battery with software while the power adaptor was still on, would be great help.

Macbook pro thunderbolt cable to imac in target display. The imac also has a thunderbolt display. Will the macbook control all three monitors

I have a macbook retina and a imac 2012. I am looking at getting a thunderbolt display. I have currently my macbook retina connected to my imac and using target display when i need the other display. I am thinking of getting another display to use on my imac for when i need more room on my imac. My question is what will happen when i switch my imac in target display for my macbook. the ask a question person said my macbook will take control of all three but this other website said the thunderbolt would turn into the primary for my imac and the imac would be my secondary for my macbook. I was wondering if anyone knows for sure or can try it and tell me.

Assuming you have a 27-inch iMac, you use a Mini DisplayPort to Mini DisplayPort cable. If it happens to be a 21-inch model, no combination of display cables or adaptors will work.
(115987)

IBook G3 700Mhz won't power on at all

Hello,
My iBook G3 700Mhz (CD-ROM, 2002 model) recently died completely - it won't power on, there is no chime, no disk activity whatsoever. There were no indications that there was a fault prior to this - I had used it with no problems just a few hours beforehand. I have heard of logic board failures, but from what I have read some form of activity still occurs, or there are faults that occur sporadically shortly before it completely fails. My iBook has run perfectly since I bought it in 2003 with no sign of any problems at all.
Is this likely to be a logic board fault? Or could it be a fault with the PSU? The battery still holds a charge (it is on 2 lights), the power cable still turns orange when plugged in, so power is still getting to the machine.
I appreciate any help anyone can give - I would like to be able to get to the data on my hard drive, as although I have made regular backups, the last piece of work I was doing (the day my book died) will still be there, and hasn't been backed-up.
Thanks,
Andrew
(iBook spec: G3 700Mhz "P72B", CD-ROM drive, 640Mb RAM, Airport, OSX 10.4.10)

Thank you very much for your help, very much appreciated. Unfortunately, I have no friends with iBooks (just MacBook Pros - very flash), but I have ordered an ibook G4 which, should it eventually arrive (I managed to be sent a job lot of laptop hard disks by accident today, which was akin to rubbing salt in my wounds) I will use to test the power cord.
I think the power problem sounds the most likely candidate, thanks to the article link you sent me. One thing I noticed last night when trying out your tips was that when the power lead was connected, the battery life indicator stayed on the whole time. I'm not sure I remember it doing that before, so that could be an indication of the problem. Also, the ring on the power cord stayed orange throughout, despite the battery showing full power. There are no Apple Stores where I live, but I am hopefully visiting a city with one this Weekend, so I may well take my iBook with me for diagnosis. I'm not sure I can justify the price of a logic board repair, but a PSU replacement might be more palatable.
Again, thanks very much S.U. and Ronda. I will keep you posted on any further developments.
Andrew

My computer won't power up at all. Battery fully charged. Nothing but black screen.

I tried to use my Mac Book this morning and it won't power up. The battery is fully charged but the screen stays black. Any ideas?

Troubleshooting a computer that will not power on
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G3 won't power up at all

I'm running 9.2 on a B/W G3 and was working fine, but I moved it (from one side of desk to other. It worked fine. But I didn't like the arrangement, so I moved it back (powering down, unplugging cables/cords, moving, replugging) and now it won't power up (either from the power key on the ADB keyboard or the "oi" button on the front of the Mac.
I tried 2 different ADB keyboards and 1 USB keyboard and nothing.
Any thoughts? Seems funny it worked 1 minute and 5 minutes later wouldn't.
Thanks!

Hi, Michael -
Welcome to Apple's Discussions.
First thing to do is to recheck the power cables/cords. Be sure the one for the Mac is secure at both ends. If you use a power strip or equivalent, make sure it was not turned off accidentally.
If that doesn't fix it, then try a CUDA reset -
Article #95065 - G4 (PCI) - Resetting Cuda
That article describes a G4 (PCI) model, but the procedure is identical for the B&W G3.
If that does not fix it, try replacing the internal battery. Many Mac models, particularly G3 machines, will refuse to boot if that battery is too weak or dead.

23 inch hd display won't power up

After not using my G5 dual 2.7 for 3 weeks, i powered it up and the display remained black. the only hint that something was getting to the display was two quick blinks and a pause that repeated on the inrared on the mouse....keyboard was dead too. the screen turned on once after several restarts but remained blank after restarting again. i plugged into my powerbook with the same symptom. i have a 20 inch display that fired up fine on the tower so i ruled out the video card ( or so i speculate). what i discovered was by unplugging the power from the display to the power supply and plugging it back in , the screen came to life and stayed on until i shut down again. i duplicated this on the powerbook also. anyone hear of this? wouldn't think the power supply would have an affect but obviosly it does. I have a radeon 9650 in the computer.....any thoughts?

sorry i posted this question in the incorrect forum

Why Apple Thunderbolt Display won't work on BootCamp Win7 64-bit while being plugged to MBA?

Hello,
I have MBA (latest) & installed win7 64-bit in BootCamp, I do also have Apple Thunderbolt 27" Display.
When I disconnect the ATD and re-connect it in Mac OS X, it works fine like a charm, but when I disconnect then re-connect in BootCamp, it doesn't work at all whatsoever, in fact, I have to restart my MBA (while thunderbolt is connected) to make it work in BC, this is the only way to make it work.
So, my question is; If I disconnected ATD in BootCamp then re-connected it, why it won't work?
I've googled everywhere about this issue, but no luck.
Any idea?

to calculate how much video ram is needed one
take
the vertical number of pixels and * with horisontal number of pixels and * with 32bit colour which is 4 bytes
so if it's the 13" macbook air
1440 * 900 * 4 = 5.184MB for main display
+
2560 *1440 *4 = 14.75MB for second display
sounds like the intel hd 5000 would have that as dedicated memory even if the windows driver did not allow to use shared system mem as extra
could be a problem with the driver for windows
maybe a person who ran a setup like yours would have more to contribute with
my setup is an imac 21" with amd video card and a 24" dvi dell monitor and that works fine in windows so it's a different animal altogether

IMac Second Display won't power down

I've added an LG 20" widescreen as a second display for my 20" Intel iMac (white). When the iMac sleeps or powers down, the LG display goes blank but not black, power button remains on and a "check signal cable" message displays.
A second problem is that I've been trying to get the two displays to look the same, color-wise. The color match option under displays>color gets it close, but that option has disappeared from the list of choices. Before, I could choose from the LG color settings as well as several generic choices (Color match, Adobe RGB, etc.) Those other choices have gone away. The calibrate option is still there. I just upgraded to Leopard. Did that have anything to do with it or was it just a coincidence?

Have you checked the Energy Saver settings? System Preferences / Energy Saver.
If the settings are what you want, you can try this. Change them to anything at all then change them back to what you want. The restart the computer and reset the PRAM.
Shut down your Mac.
Locate the following keys on the keyboard: Command (⌘), Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

IMac won't power up at all

Have an iMac 266 G3 "Strawberry" tray load with Panther. The other day it would not power up. No chimes, no lights. Completely dead. Swapped out the power cord and also plugged it into several different outlets but nothing. Same results with the keyboard power button. The machine hadn't been on for several weeks prior to the problem.
A while back it did give an error message when booting up about the time and date being incorrect. Is that a battery issue? Could a dead battery prevent the machine from powering up at all? Remember, no chimes, no lights, no nothing. I don't want to spend a fortune on repair. Can I fix this myself or am I outta luck?

The battery may not be your only problem if your system info is correct:
"G3 iMac "Strawberry"; Mac OS X (10.3.2); Tray load, 266 Mhz, 96 MB RAM"
The minimal RAM requirment for OS X is 128mb. Suggest you purchase as much as you can afford while you are battery shopping.
http://www.ramseeker.com
http://www.crucial.com
Radio Shack's battery# is 23-026. It is a 3.6V Lithum 850mAh 1/2-AA battery made for Apple computers.
Mac 3.6 Volt Battery
http://docs.info.apple.com/article.html?artnum=86181 Macintosh Family: Batteries and Part Numbers.
How To Change The Battery 233MHZ-333MHZ iMacs

Thunderbolt display won't power up at all

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