[Image publication]Thunderbolt Display!Color is different only lower right

Color is different only lower right
Please tell me
Thanks in advance.
I can understand a little English.

Today!
returned goods unsold.

Similar Messages

Thunderbolt display not recognized - but only after supper!

Ugh. Getting seriously frustrated with my 27" TB display, now. Have been using it on a MBP 2011 for a while, had experienced some flickering with Lion, not so with ML.
Last week, I left my MBP connected and went in for supper; when I came back, the MBP had - of course - fallen asleep. Woke it up, but only the MBP display came on, not the TB display. I unplugged/replugged, several times - same thing.
Rebooted the MBP, with the TBD plugged or unplugged - same thing.
SMC reset - same thing.
I spent two nights reading forums and trying all sorts of fixes - no luck.
Finally, I resigned to booking an appt with the local Apple Store; this appt was for this morning. This morning, before getting the monitor out of the office, I decided one more time to connect my MBP - it worked!!! ***?
So I worked all day, no issues. Very happy.
Tonight, before going in for supper, I unplugged the monitor and closed my MBP's lid so it would go to sleep. When I came back, I woke up the MBP, connected the TBD, and...nothing. Black screen!! Went through a couple of rigamaroles to try and get it back - nothing!
Argghhh!!
So now, I'm wondering if my diet has something to do with it. Tonight, I had T-bone steaks on the grill, with roasted potatoes and a salad. Maybe if I would have had pasta instead the monitor would have gone back on?
Any ideas, suggestions or magic spells would be greatly appreciated.
As would a fix from Apple...
Jacques

I have been having the same problem since I got the **** Thunderbolt display and a lion-installed macbook pro in September last year. I've been sitting tight thinking surely Apple will fix this debilitating defect on their premium equipment - How wrong was I!
My story is similar in that I always take the laptop home from work and have the Thunderbolt display in my office at work. I close the lid putting the laptop to sleep and pull out the cables. When I go home I may use the laptop via its internal display (one would think that would be ok) and then close the lid and put it back to sleep. WHen I return to work, plug in the cables and open the lid, most of the time the thunderbolt display stays black. On a rare occasion it will switch on but I can't fathom any pattern as to when and why it might work. The only solution to get the display to switch on is to reboot the laptop (and lose all my open documents from work the previous day and night). Recently, and I'm not sure what has triggred it, things have got a whole lot worse. Now, if I reboot the laptop when connected to the unresponsive screen upon restart the Thunderbolt display freezes on a grey screen and the laptop display stays black. The only solution is to hold down the power button and force shutdown the laptop. This happens everytime now, I simply cannot reboot the laptop with the thunderbolt display attached!
Nice premium equipment Apple! As this stuff was bought by my work I have learned to live with it. If had bought this junk with my own hard-earned then I would be furious and would have demanded a refund/replacement/explanation a long time ago.
Maybe, just maybe, Apple may one day actually fix this £2000 setup I have sitting on desk so that it switches on when its supposed to. Is that too much to ask?
Sat

MBP Retina and Thunderbolt Display color correction

What are my options regarding color correction for a new 13" Retina MBP and Thunderbolt display using Spyder color calibration system, or equivalent? Really important I nail that down before purchasing.
Thanks!
Tom

Disable GPU drawing in Photoshop's preferences, and let Apple know about their video driver problems.

Display resolution is different left and right sides

Hi, my HP G42 laptop now has a different display resolution on the left and right sides. The left half seems to have less resolution than the right side, the right side looks like it's in HD, the left side looks washed out. I'm not sure if it is a hardware issue or a setting/software issue. The first time it appeared was after a windows 7 update was completed and installed, I'm not sure if that was just a coincidence. Any suggestions would be greatly appreciated. It works but is very annoying to look at.
Thank you,
Ray

Hi Ray_M,
Welcome to the HP Forums! I see that you are having a problem with two different resolutions on each half of your screen. The easiest way to determine where the problem lies is to connect it to an external monitor. If the image is normal then we know it is an issue with the display screen but if the issue occurs on the external monitor then we know it is a problem with the drivers or the video card itself.
What is the product number for your g42? There are a number of different models in that series.
Please click “Accept as Solution ” if you feel my post solved your issue.
Click the “Kudos Thumbs Up" on the right to say “Thanks” for helping!
Thank you,
BHK6
I work on behalf of HP

Secure sites no longer display the lock symbol in lower right corner, how do I verify the security of a site?

On previous versions when logged onto a secure site a green lock symbol appeared in the lower right hand corner of the page. Since downloading the most current version of Firefox, this is no longer displayed. How then do I confirm the site I am on is encrypted?

The Statusbar is gone in Firefox 4.0 ''(six months ago)'' and the "lock" with it. Security information about a web page is shown by the Site Identity Button.<br />
The old padlock could give users a false sense that a site is secure by not supplying all of the information about a site and only showed that there is a secure connection that didn't guarantee that you are connected to the right server. The Site Identity Button was introduced in Firefox 3.0 to show more complete "identity" information for HTTPS web pages. <br />
https://support.mozilla.com/en-US/kb/Site+Identity+Button
You can add a padlock to the location bar with the Padlock add-on- https://addons.mozilla.org/firefox/addon/padlock-icon

Display a metric differently only on last day of the month.

Have a Daily transaction fact where unit cost of product is stored at a day/part num /business unit level.
When we drag and drop date column and unit cost in the report like below we will have
Date      cost
Sep29     $10
sep30     $12
Oct1       $12
Oct2       $14
..........ans so on
The source sustem program runs on last day of the month around 8pm for setting up cost to reflect on 1st of every month
But the nighly OBI load ( Runs at 2am every day) when incrementally updating Sep30 data picks up $12 from the erp and populates in OBI.
But actually speaking, on Sep30 the cost was $10.
There is no way of running the ERP program to run afer OBI load. Hence we need an expression in the RPD (not answers) saying
when last day of the month (any month) the standard cost must be a previous day value.All other days the same value should be returned.
Is this possible without impacting report performance ?
So, when we drag and drop date and cost value the above report should change as
Date        Cost
sep29     $10
sep30     $10
Oct1       $12
Oct2       $14
Oct30     $12.5
Oct31     $12.5
Nov1      $13.5

You can achieve the above requirement for current month alone with below steps:
The solution requires to have a union report
First part of the report will have Date and Cost fields with a report level date filter, Date NOT IN (TIMESTAMPADD( SQL_TSI_DAY , -(1), TIMESTAMPADD( SQL_TSI_MONTH , 1, TIMESTAMPADD( SQL_TSI_DAY , DAYOFMONTH( CURRENT_DATE) * -(1) + 1, CURRENT_DATE))))
Second part of the report will have Date and Cost fields with a report level date filter Date IN (TIMESTAMPADD( SQL_TSI_DAY , -(1), TIMESTAMPADD( SQL_TSI_MONTH , 1, TIMESTAMPADD( SQL_TSI_DAY , DAYOFMONTH( CURRENT_DATE) * -(1) + 1, CURRENT_DATE))))In the second part of the report,
Change the column formula for Date to display only Current_Date
Change the column formula for Cost field with FILTER(Cost USING Date = Current_Date-1)
Pls mark if correct/helpful.

How do go back to my default display color settings? Just bought Spyder 3

Hello out there in Genius land...
I just purchased Spyder 3 Pro to calibrate my display monitor, but in order to do this correctly, I need to go back to my default color display settings.
I have manually calibrated my display several times in the past in the advanced mode, so I am familiar with this process, but I am unable to figure out how to go back to the default. Can't find a default option in the color settings tab.
Any assistance in this matter would be greatly appreciated.
Thanks,
Anneita

Thank you for your quick response.
I just checked mine since I never changed it. It shows I have two default color >displays - Color LCD.
When I select either one, the "Delete Profile" button is grayed out. This would >indicate to me that you should also still have your "default" color profile >showing.
Hmmmm....
Good point about the grayed out "Delete Profile" button. I went back into my "Color" tab to check it out, and I have 4 different profiles listed:
- 12-30-10
- 7/29/08
- Color LCD
- Color NTSC (19530 Calibrated
When I click on each of them, they show a totally different display color.
The only one that the "Delete Profile" button is not grayed out is 12-30-10, which I made on that date. The other 3 delete buttons are grayed out. But I am thinking that my actual default may be the one that says "Color LCD" like yours.
Is that safe to assume? What do you think?
Thanks,
Anneita

Is there a switch I can use with thunderbolt display and 2 computers

I have the new Mac Mini and the new Macbook Air plus the 27 inch thunderbolt display. The majority of the time, I will be using the thunderbolt display hooked up directly to the Mac Mini. I have already tested the theory that if I turn off the Mac mini, I can use a separate thunderbolt cable to hook to the port on the back of the display and to the port on the Air and have it show up on the screen. Many people said this was not possible as the port on the back of the display was only unidirectional and to be used for thunderbolt accessories like hard drives. It actually works quite well and so at the very least, I can leave the cable plugged into the back of the display and use it with the Mac Air if I turn off the Mac Mini. At least I don't have to remove the cable from the Mac Mini and move it over to the Mac Air. I actually looked at the Kanex switch which would do what I wanted it to do, but unfortunately it says it will NOT work with the thunderbolt display. Apparently it only works with the Cinema display. Does anyone know if there is a thunderbolt switch out there?
Thanks

Thanks, Clinton....that's what I was thinking too. On the upside, I don't have to remove the actual thunderbolt display cable going to the back of the Mini, I just have to keep a cable in the output port on the back of the display for my Macbook Air. Then I just turn off the Mini, plug the cable into the Air and I'm ready. What I find interesting though is that the Kanex "looks" like it will do exactly what I want it to, but apparently it will only work with Mini Display port like that found on the "cinema display". Maybe one day........
Thanks again!

How can we change the color of the image for product display for different

Hi All,
How can we change the color of the image for product display for different colors, to be displayed on site.
jeff

Hi priya,
The requirement that you have stated is not a standard feature in ISA CRM. In order to do the same, you will need to modify the standard ISA code in Java. A common path for the solution would be as follows:
1. Colours
    a. Maintain a text type for Color under the object - PCAT_ITM in Customizing.
    b. Modify the standard search of ISA to search within your new text type as well. (In standard it only searches in Description.
   c. Maintain all shirts colour data in the new type created in step a.
   d. Your requirement will be done!
2. Price
a. Use list prices for your shop and assign the appropriate condition type, acces in your catalog.
b. Modify the standard search of ISA to search on the list prices as well.
c. This too will be done!
3. Accessories - This is very tricky, and will require some exploration. However, here's my opinion,
a. Search for the standard function module, which will return the accessories when provided the product as an input.
b. Modify this function module according to your requirement and ensure that it can be accessed remotely.
c. Modify the JSP as in steps 1b and 2b above to call this new remote-enabled function module.
d. Now you're done!!
The ISA modification part is not so simple, you need a really good guy like "Sateesh Chandra" who'll be able to handle your requirements. This is all I could manage, hope it is some help to you!
Thanks & Regards,
Nelson.

Bridge displays color images as b&w

I assume this has something to do with settings in Bridge CS4, my platform is MacBook Pro OS 6.8.10.
This question might confuse some people. To beging with, I do shoot my images in RAW files, I even have Bridge convert them to DNG files.
Upon download the images are displayed in color as they should be for RAW files. After editing images in Camera RAW, I convert most all images to sRGB. When some of those edited images come back to Bridge, they might be presented in B&W, though no color is lost to the file upon displaying in Photoshop, and I did not edit the file to be a B&W image. I have DNG, Canon RAW, Tif and Jpeg files, and most of these are displayed in color, but some are not, and I have not figured out the missing link just yet. So to be clear, I have Jpeg color images, displaying as b&w images, but they are color images. Only b&w images should be displayed as b&w.
This problems started once I learned I could edit one image in photoshop out of a series of images, then after editing, i could bring the single photo file back to bridge, and then copy/paste image settings onto a groups of images in Bridge, and all those images would then have the same adjustments made to them as a batch edit adjustment.
But now sometimes I get a B&W display on some images even when I do not apply a Bridge settings edits, and when I never edited the image for a B&W display. I has to a setting somewhere in Bridge, and I just have not figured it out yet.
Thanks in advance for all suggestions:

ssprengel wrote:
Yammer asked a pertinent question that remains unanswered—is that “settings” badge (small lines-triangles-in-a-circle) shown on the B/W image thumbnails (at least). If you’re not sure, then include a screenshot of a few Bridge thumbnails where some are color and some are B/W, using the little camera icon on the web version of the forum messages.
And the answer is NO!. I only have those showing up associated with the .DNG files (Camera RAW)
Another similar question would be if you see a B/W thumbnail in Bridge, try doing a right-click (or whatever the Mac equivalent is) and choose Open in Camera Raw. Is the image in B/W or color in Camera Raw.
A <Control Click> (on MAC), opens the .jpeg file in b&w, as shown in the thumbnail.
Can you upload three versions of one of the images that display as B/W: the original PSD/raw/TIF file, a normal Save As JPG that is in color, and a Save For Web JPG that is B/W? Use something like http://www.dropbox.com/ and post a public download link to the images, here.
NO, I thought I explained that real well. Only the .jpeg file that was saved through the "Save for Web" processing ( that is, the a jpeg the goes through greater compression to reduce image file size for web display), is the image file process that produces the b&w thumbnail in Bridge ONLY. All opened images, of various file formats (ie: DNG, Psd, Tif, Jpeg, & Jpeg for Web), all present Color presentations (for editing in Photoshop, and or in display browsers). It is only the thumbnail of that particular jpeg formatting processing for Web Images that produces the b&w image "THUMBNAIL" in Bridge.
When you Save As JPG or For Web, are you ever overwriting the original image with a new one or do you always save the PS-edited image with a new name?
No, never. I leave my RAW files, as RAW originals, and work on newly names images files.
A theory about what is happening is that Bridge uses Camera Raw to generate its thumbnails, and the images that are B/W have some embedded Camera Raw setting, perhaps pasted from a different filetype, that makes CR think the image should be rendered as B/W, but when you open the images on Photoshop, you are opening them directly, without using the Camera Raw plug-in, so any embedded settings are ignored, and the image displays in its original state without the settings having been applied.
It makes since, (what you are saying), and it certainly does respond in that fashion. Your suggestion to open Ctrl Click, or Right Click to open the thumbnail in Camera RAW, was an interesting test, and the response was to open the previously save color image with a b&w thumbnail, into Camera RAW as a b&w image. So Camera RAW is responding to what is in the xmp settings that describes this images thumbnail to be displayed b&w. It is weird that a browser does not.
As to what is in the window selections for the "Save for Web" editing windows, Presets for jpeg are :
Progressive
Optimize
Embed Color Profile
And I use Embed Color Profile.
Even the Preview button at the bottom of the window, shows the color image as displaying color.
I vaguely remember about a year ago doing some CS 4 Photoshop and Bridge web tutorials from an unnamed tutoring website and guy named D_k_ . It is his fault. Just kidding, I actually enjoy those tutorial.
**** Okay, this is perhaps originating from Camera RAW presets, where you can apply previously made settings to other images and then saved them as Presets. Though I don't have this checked in Camera RAW ( still something goofy is going on there), I did find that in Bridge I can reset the individual "saved for Web" image thumbnail back to the the color image by :
Right Click (Ctrl Click, MAC) on the thumbnail
menu down to the "Development Settings" and select :
"Previous Conversion", and this presents the color thumbnail.
I have now tested all the Camera RAW settings in Camera RAW, by opening an image in each one of these :
Image Settings
Camera RAW Defaults
Previous Conversion
Custom Settings
and then reducing image file size, and saving for the web, while changing file name, and each and every one of these Settings produces a Sepia Toned thumbnail. I found out the images were a subtle Sepia Toned image by enlarging the Bridge Thumbnails bigger for a better view. So I can correct the thumbnail after it has been created, but so far, I can't get the thumbnail to be correct on first creation of the web saved jpeg image file. Regular jpeg image file thumbnails save correctly.

Why does Photoshop display colors differently from the other applications even in sRGB mode ?

Hello all !
Here is my problem :
Photoshop is set to use sRGB workspace (in edit/colors.../workspace/RVB).
If I understand correctly this is how all native windows applications work.
This means Photoshop and the other applications should display the same colors on a file with a sRGB profile.
Now this is the case until I calibrate my monitor.
When I do, Photoshop colors become different from the other applications (irfanview, explorer, browsers...).
The only way I found to let everything display the same colors is to set Photoshop to use Proofing/RVB Monitor.
What upsets me even more is that Photoshop colors look "better" to me (dark grays seem to dark to me in the other applications.)
I have read that this is because Photoshop takes the new profile into account and others applications do not. But I don't think this is relevant here because everything is in sRGB so the only profile is my monitor's and I think calibration is handled globally by windows : everything (including browsers, explorer, and Photoshop) changes color if I choose to apply the monitor's profile or not with windows color management tool ("use my parameters for this device").
Here is my system configuration :
- Photoshop CS4 (11.0.2)
- Windows 7 64 bits
- HP ZR2440W and DELL 2209WA (these are not wide gamut screens)
I have spent two days trying to figure the logics behind this and really am upset. Any help would be greatly appreciated. Don't hesitate to ask me if there is something that is unclear or some information I forgot to mention.
Thanks in advance,
Yannick

That sounds like an invitation to continue to talk about the issue. Fair enough.
I'm not sure where you're getting "insecurity"... I am just trying to help you help others more effectively.
I invite you to re-read just the first sentence of what you wrote very carefully, putting yourself in the shoes of someone struggling with both the terminology and the concepts:
Photoshop (CMS) reads an embedded ICC profile and CONVERTS it to the custom monitor profile for a theoretical 'true color' display
Think about what "Photoshop (CMS)" might mean to a person who doesn't know the acronym might stand for "Color Management System" (which is I assume what you meant). Adobe themselves don't call it "CMS", they use the acronym "CMM" (Color Management Module). The term "CMS" is used in the computer industry for about a dozen different things.
While a color profile might have been embedded in an image file before it was opened by Photoshop, Photoshop works on documents. A profile is not "embedded" in a document, it is maintained by Photoshop with the document and describes the color values in the document. If Photoshop opens a document without an embedded profile, depending on settings and user choices it might assign a profile or it might even operate on the document without color-management. Oversimplification doesn't help people when they're trying to learn new things unless it's described as such, for example, "This is a bit of an oversimplification..." or "Generally speaking..."
Not every monitor profile is a "custom monitor profile". Quite often a standard profile (e.g., sRGB IEC61966-2.1) is associated with a monitor by the operating system as a default, or a factory profile is installed by a driver package or system update. Your use of the term "custom" is a bit ambiguous and could be read as implying the creation of a profile using a calibration and profiling device specific to the particular monitor.
Photoshop's color management code does not convert an embedded ICC profile at all (read carefully what you wrote). As I said, it transforms color values. That was the key error in your description that prompted me to comment.
If ever there is a time to pick words carefully, it's in a color-management discussion.
-Noel

Thunderbolt Display - Image stopped working over night, while in sleep mode

Hi All,
Wondering if anyone has this problem?
Been using TB display fine for over a year. Connected into it are a couple of external usb hardrives, TB WD backup (which has a mini-HDMI monitor connected into it). The monitor has always worked well with the clamshell closed - seems like previous updates have fixed the odd phantom decision of which monitor should come on and when.
Over the night, after putting the monitor into sleep mode, when I woke it up all systems kicked on (I could hear the external drives working and the other external monitor turned on), but no image came up on the TD display. My macbook thought it was on, as I could sweep my mouse over into it and initiate programs on that screen (but just not see them).
I unplugged everything from the display - still same problem, no image. When I open my macbook up, while connected, it again thinks the display is active but there is no image. When I sweep out, my macbook thinks the in-computer display is "Display 4".
Because of the previous nuances with the TD display, I'm hoping hope that this is a software issue, but it kind of seems like hardware.
Any insights would be great!
Thanks

Another update for you all....
While watching a movie on the TV yesterday the Mac Pro and Thunderbolt display went to sleep and once again when I tried to wake them the screen was totally black. I called Apple again and the only thing they could suggest was to take the screen to an authorised service provider so that they can run tests.
After going through the resetting of just about everything I got the screen working again.
I then trawled through forums on various sites and can see that this is quite a common issue - especially if your connected computer is running Mavericks.
Other solutions which people have used are plugging the power plug for the Thunderbolt display into a totally different power source (if that's possible in your set up). Thankfully for me it is.
Another suggesttion which has worked for others is to disable the Power Nap feature within the Energy Saver perference pane.
I did both of those and for the first time this morning the Thunderbolt Display woke up when I woke the Mac Pro!
However I did get an error message that he system had recovered...
Date/Time:       2014-06-15 01:57:42 +0100
OS Version:      10.9.3 (Build 13D65)
Architecture:    x86_64
Report Version: 18
Event:           Sleep Wake Failure
Steps:           0
Hardware model: MacPro6,1
Active cpus:     8
================================================================
Code: 0x4000c27006700
Now I know for sure nobody tried to wake the computer at just before 2 in the morning!
The log points to wake for Network Access being the culprit here
Jun 14 23:52:02 Johns-Mac-Pro kernel[0]: Wake reason: RTC (Alarm)
Jun 15 01:51:55 Johns-Mac-Pro kernel[0]: RTC: Maintenance 2014/6/15 00:51:55, sleep 2014/6/14 22:52:02
Doing more digging in the internet I found this article
http://sysadminblogger.wordpress.com/2013/12/02/os-x-mavericks-wake-for-network- access-with-no-random-wake-ups/
So I am now thinking that not only has power nap been causing issues with the display but wake for network access is also not really working as Apple intend it to.
As I am a home user there really is no need for me to need wake for network access enabled anyway so I am also going to disable that. Hopefully this will mean that I have no more random phantom wake ups which I think may have been the cause of this issue all along.

Lightroom displays colors differently than Photoshop

Lightroom (and my image previewer - IfranView) display my image colors differently than photoshop. This is very disturbing (why can't Adobe make this simple!)!
Image in question - see below. Center image is Photoshop, left is Lr 4 and right is InfranView.
Colorspace: AdobeRGB 1998
Image color (exported the TIFF file in Lr, what is shown below): AdobeRGB 1998
NOTE: when I export out as sRGB, IfranView displays it correctly (I don't know why, it can't display ProPhoto correctly, but never had a problem with AdobeRGB). Lightroom looks incorrect when viewing the TIFF, AdobeRGB JPEG and sRGB JPEG.
What is going on?? I've tried this on two computers now and it is the same problem!

The larger file is Adobe RGB and the smaller file is sRGB. I see no difference in overall tone or color between the two files in LR 3, LR 4, LR 5, PS CS5, PS CS6, PS CC 2014, or Windows Photo Viewer which is color-managed, aside from an almost imperceptible change in the darkest blacks which I'd expect since you're converting AdobeRGB to sRGB at some point.
I can make the Adobe RGB one look like it does at the left of your first screenshot if I Assign Profile: sRGB to it in PS.
Since your monitor appears to be wide-gamut and therefore similar to Adobe RGB, I think the problem you're having is that LR thinks the monitor is sRGB for some reason, perhaps due to your switching the cables from one computer to the other without rebooting and recalibrating. It's also possible that your profile is stored in the monitor rather than in the computer and one computer understands this and the other doesn't so you're getting double-profiling or no profiling occurring.
It sounds the your only issue is having two computers attached alternatively to one monitor without having a valid profile on each computer for that monitor and aren't restarting each computer to load that profile. At least that is my analysis given the limited information.
I would conclude that nothing is wrong with LR or PS just the hardware connections and the color management confusion between the two computers, not your confusion, the computers'.

Thunderbolt Display has issue with weird washed-out colors after waking from sleep (after upgrade to Mavericks)

I've got a Thunderbolt Display that I use with my Macbook Air (mid 2012) - usually in clamshell mode.
When I let the computer go to sleep, and then wake it up by clicking the mouse, the monitor turns back on but the colors are washed out and purple looking.
The display goes back to normal when I unplug and replug it to my laptop.
I first noticed this problem after upgrading to Mavericks.
I made a video demonstrating the issue here:
http://www.youtube.com/watch?v=19179-MVpWA&feature=youtu.be
Any ideas?
Thanks!
Will

Same thing for me too. Late 2012 13" MBP Retina. I have to unplug the Thunderbolt cable and plug it back in.
This has only started for me in the last two days. The first two weeks of Mavericks was ok.
Update: I just got back from a trip. I was using the laptop separate from the Thunderbolt display. I hadn't restarted since I returned and connected the monitor. I've just rebooted, and put the computer to sleep. After resuming from sleep, the display is ok. Maybe try rebooting? I'll update if it continues.

TS4080 apple thunderbolt display image on display intermittently goes dark, does not wake from sleep after clicking mouse or keyboard, but there is "bonk" sound after clicking mouse or pressing keys. Rebooting by pressing the power button resolves issue.

My apple thunderbolt display (which I purchased 1.5 years ago; OS 10.7.5 Mac Mini) intermittently goes dark, does not wake from sleep after clicking mouse or keyboard, but there is "bonk" sound after clicking mouse or pressing keys, so am thinking it is a hardware problem with the display. Rebooting by pressing the power button turns the screen back on, but the same phenomenon has occurred several times. Could this be a software issue, or do I need to have my display repaired? Your feedback would be appreciated.

Hi ED, tough to tell, but it does sound like it's waking with the bonk, just not displaying.
Long shot but...
I wonder if it's a variation of this, of which I've seen many different symptoms...
Resolution
Move the mouse or trackpad cursor over the center area of the login window so you can see the user icons. Click on the icon of the user that you would like to login as, type in the user's password, and press Return.
If the login window is configured to show only the name and password fields, type in the user's name and password into the fields, and press Return (even if you cannot see the rest of the login window).
Additional Information
This issue will not occur if the display is not sleeping when the account is logged out. Use the steps below to confirm that the account is not configured to log out automatically while the display is sleeping:
1. Open System Preferences > Security & Privacy > General. Click the padlock to unlock the preference pane and enter your admin password. Click the Advanced button at the bottom, then see if the option "Log out after N minutes of inactivity" (where N is the number of minutes) is enabled.
2. Open System Preferences > Energy Saver and configure Display Sleep to occur after the account is logged out, by dragging the slider to a number of minutes that is greater than N was set to in the previous step.
Important: If automatic log out is not needed, disable "Log out after Nminutes of inactivity" in System Preferences > Security & Privacy > General. This will also prevent the issue.
http://support.apple.com/kb/TS4135?viewlocale=en_US

[Image publication]Thunderbolt Display!Color is different only lower right

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