Apple cinema Display is dead, any tips to bring back to life

MY 27inch cinema screen has died after a power surge, is it gone forever???

If you don't know the model, find the Serial# & use it on one of these sites, but don't post the Serial# here...
Using this serial number locator is way better than Chipmunk, and more secure:
https://selfsolve.apple.com/agreementWarrantyDynamic.do
How to find the serial number of your Apple hardware product...
http://support.apple.com/kb/HT1349

Similar Messages

  • HT2810 apple cinema display sometimes needs to be unplugged and plugged back in multiple times to turn on  any ideas for a fix?

    apple cinema display will not allays start
    i need to plug and unplug multiple times for ti to start.
    any thoughts ideas would be helpful thanks

    Okay, Mr. Easthills, you have an imac, but yet you mention apple cinema display....Hmmm, curious. you could try zapping the PRAM, hold down command (apple?), Option+P+R keys while rebooting mac. Hold down for 3 chimes, then let go and boot normally. I have this problem too, and I have a 20" widescreen apple cinema display(DVI connector--did I just date myself or what?),anyways, it's behaving itself now okay, but it tended to go dark right in the middle of whatever I was doing, and only unplugging the power cord to the display, and replugging in it would fix it for a while. sometimes it would happen again, and again the same solution.  As to why it happens now with Yosemite, I don't know .  This dear old monitor has lasted me about 8 years and it's still going just fine.. not state of the art anymore, though...
    oh well, good luck to you
    John B

  • Unable to use any Apple Cinema Displays with unplugged 2011 MBP

    My older MBPs have worked with Apple Cinema Displays (I currently have a few year old one and a 2011 27" ACD) while unplugged.  My new 15" MBP however needs to remain plugged in to allow waking (or prevent sleeping) when hooked up to the display in clamshell mode (computer is closed).  Is this a bug, a problem with my configuration, or just the way it is?
    Thanks for any replies.
    Jeff

    Jeff,
    if you want your settings to be the same plugged in while not plugged in, you'll need to do so in energy saver preferences in system preferences.
    once there, you can tell your computer how to act when on battery power or when plugged in. This means telling it to not sleep even when not plugged in, or visa versa.
    if you're talking about using your MBP closed while using the ACD, all you need to do is close it, and move your mouse around. it'll wake up but your ACD will become the main display with your dock and toolbar.

  • Is it possible to connect both a Wacom 24in. Cintinq AND a 30 in. Apple Cinema Display to any of the current line of iMacs?

    I currently have a Wacom 24HD Cintiq and a 30 in. Apple Cinema Display hooked up to an old '06 Mac Pro. I'd like to purchase a new iMac to replace the Pro. Is it possible to attach the Cintiq and Cinema Display to it?

    Hello, it depends what kind of inputs those Monitors have, but if I see them correctly...
    30" needs this...
    http://store.apple.com/us/product/MB571Z/A/mini-displayport-to-dual-link-dvi-ada pter
    And the Wacom this...
    http://www.newegg.com/Product/Product.aspx?Item=N82E16812191224
    A notable peculiarity of Thunderbolt is that it uses exactly the same connector as Mini Display Port, and that's not all. The Thunderbolt connector also carries Mini Display Port video signals. That means you can plug a Mini Display Port video cable/adapter in to a Thunderbolt connector and your monitor will work.
    If you plan to do other things with your Thunderbolt connector and don't want it wasted on a monitor, you can also choose an HDMI --> DVI adapter, which for your purposes will be functionally equivalent.
    You can even use both at the same time.
    - Anonymous
    http://x704.net/bbs/viewtopic.php?f=13&t=6134&p=75115&hilit=thunderbolt#p75115
    Even the 21.5" can support...
    2nd Display Support:
    Dual/Mirroring*
    2nd Max. Resolution:
    2560x1600 (x2)
    Details:
    *This model can simultaneously support two external displays up to 2560x1600 via Thunderbolt.
    http://www.everymac.com/systems/apple/imac/specs/imac-core-i5-2.7-21-inch-alumin um-late-2012-specs.html

  • Hello everyone, hoping for some help with my new Apple Cinema Display 20"

    Hi everyone, I bought an Apple Cinema Display 20 inch LCD monitor, just about 3 weeks ago. I have two issues I am hoping to get some help with.
    1) I am using the screen on a PC with Windows XP, and I was very disappointed at the lack of PC support. I have no on screen display (OSD), so I can't see what percentage I have my brightness set to, and I can't alter the colour or contrast of the display, etc. Luckily it defaulted to very good settings, but I would really like to be able to use the (fan made?) program called "WinACD". If I would be best asking somewhere else, please direct me there. If not, my problem is that I installed it added the "Controls" tab, but it just says, Virtual Control Panel "None Present". I have tried googling for an answer, and I have seen many suggestions, but none of them worked. I installed the WinACD driver without my USB lead plugged in, and someone said that was important. So I have tried uninstalling, rebooting, then reinstalling it again with the USB plugged in, and a device plugged in to my monitor to be sure. It didn't seem to help. I have actually done this process a few times, just to be sure. So I would really like to get that working if possible.
    2) I am disappointed at the uniformity of the colour on the display. I have seen other people mention this (again, after a google search), and that someone seemed to think it is just an issue we have to deal with, with this generation of LCD monitors. Before I bought this screen, I had an NEC (20wgx2), and it had a very similar issue. Most of the time, you cannot see any problem at all, but if you display an entire screen with a dark (none prime) colour, like a dark blue green colour, you can see areas where it is slightly darker than others. It was more defined on the NEC screen, and that is why I returned it. I now bought this Apple Cinema Display, because it was the only good alternative to the NEC. (It has an 8bit S-IPS / AS-IPS panel, which was important to me). But the problem exists in this screen too. It isn't as bad thankfully, but it still exists... I have actually tried a third monitor just to be sure, and the problem existed very slightly in that one, so I think I am probably quite sensitive in that I can detect it.
    It is most noticable to me, because I do everything on this PC. I work, I watch films, and I play games. 99% of the time, I cannot see this problem. But in some games (especially one)... the problem is quite noticeable. When you pan the view around, my eyes are drawn to the slight areas on my screen which are darker, and it ruins my enjoyment. To confirm it wasn't just the game, like I said, I can use a program to make the entire screen display one solid colour, and if you pick the right type of colour (anything that isn't a bright primary colour), I can see the problem - albeit fairly faintly.
    I am pretty positive that it is not my graphics card or any other component of my PC, by the way, because everything is brand new and working perfectly, and the graphics card specifically, I have upgraded and yet the problem remains - even on the new card. Also, the areas that are darker, are different on this screen than on the other screens I have used.
    So basically, I would like to register my disappointment at the lack of perfect uniformity on a screen which cost me £400 (over double what most 20 inch LCD screens cost), and I would like to know if anybody could possibly suggest a way to fix it?
    It is upsetting, becuase although this problem exists on other screens too, this is, as far as I know, the most expensive 20" LCD monitor available today, and uses the best technology available too.
    p.s. If anyone would like to use the program that lets you set your entire PC screen a specific colour, it is called "Dead Pixel Buddy", and it is a free piece of software, made by somebody to check for dead pixels. But I found it useful for other things too, including looking at how uniform the colour of the screen is. That's not to say I was specifically looking for this problem by the way... the problem cought my eye.
    Thanks in advance!
    Message was edited by: telelove

    I've been talking about this on another forum too, and I made some pictures in photoshop to describe the problem. Here is what I posted on the other forum:
    Yes, "brightness uniformity" definitely seems to be the best description of my issue.
    Basically it just seems like there are very faint lines down the screen, that are slightly darker than the other areas on the screen. They aren't defined lines, and they aren't in a pattern. It's just slight areas that are darker, and the areas seem like narrow bands/lines. Usually you can't see it, but in some cases, it is quite noticeable. It is mainly when I'm playing a game. The slightly darker areas are not visible, and then when the image moves (because I am turning in a car, or turning a plane, or turning in a shooter etc.) the image moves, but these slightly darker areas stay still, and that makes them really stand out.
    As for how it looks, I tried to make an example in photoshop:
    Original Image:
    http://img340.imageshack.us/img340/3045/td1ja9.jpg
    Then imagine turning the car around a bend, and then it looks like this:
    http://img266.imageshack.us/img266/959/td2hq7.jpg
    It's those lines in the clouds. If you can tab between the two images, you can see the difference easily. Imagine seeing those lines appear, every single time you move in a game. (I haven't tested this in movies yet, but I am assuming it's the same).
    It isn't very clear on a static image. But when the image moves, the darker areas stay in the same place and it draws your eyes towards them. It isn't terrible, but it is annoying, especially consider how much this screen cost.
    Message was edited by: telelove

  • How Can I Test New Apple Cinema Display?

    My new 30" Apple Cinema Display arrived today but the arrival of my MacBook Pro is still 4 weeks out (I ordered both at the same time for dual warranty purposes). I cannot hook this ACD to my wife's 12" PB and the only other computer that may have the ability is my daughter's new iMac Intel Core Duo (but I'm not sure if it will power the 30" ACD). I would like to test for stuck or dead pixels. Can I plug the AC cord into an outlet and no video connection then power on or will this show no pixel anomolies, or worse, cause potential harm to my display? Anyone? Thanks to all that may reply.
    PS: I threatened to cancel my order unless the Supervisor allowed me time to evaluate the new monitor the full 2 weeks AFTER the arrival of my MacBook Pro, so I have plenty of time, just no computer to run the darn thing!
    PowerBook G4 12" aluminum & iMac Intel Core Duo   Mac OS X (10.4.5)   Apple 30" Cinema Display w/ iLift LCD monitor arm

    I think pretty much any Mac with DVI will drive the 30" ACD, just not at the native resolution. You will get 1280x800. But if you are just looking at a solid full screen of a single color, for the purpose of trying to spot dead/stuck pixles, the low res shouldn't make any difference at all for such purposes.

  • Help with cleaning off a 23" Apple Cinema display HD

    Ok guys, I work with LCD's for a living, but mine are a bit different than the Apple monitors (plus, this is my dime, not my companies..). So, I come home to find out our "house guest"'s kid was flinging gogurt all over the place. I look at my LCD's and sure enough, both have someone oily on them.
    I cleaned the dell with no issues, but my 23" Apple Cinema Display HD, has a couple of marks that won't come off (I used water and a micro fiber cloth to clean it). It's like two little oily spots about the size of the tip of a finger, and one little line in the bottom right corner.
    At work, normally we would use denatured alcohol to clean the LCD surface, but I'm quite familiar with the LCD's at work, and what is attached to the polarizer. My Apple display, I'm not so sure, so I don't want to use something on it that is going to damage the surface. Any recommendations? The areas that have the issue don't seem to have any display related problems.... They aren't finger clusters, and the polarizer doesn't look damaged.
    thanks! And yes, the house guest was informed what this monitor costs to replace.... and I threatened to chop off fingers (kidding).

    Apple say not to use alcohol or ammonia. Dilute some hand dishwashing liquid. Moisten a facial tissue with it, and rub gently. Then use several facial tissues moistened with just water to remove the detergent residue.

  • 20" Apple Cinema Display - Dim Backlight Fixed! (Sorta)

    Well... as many other Apple Cinema Display owners have experienced the infamous dim backlight with the "short short long blink" - I have some wierd news to report...
    Mine got fixed last night on total accident.
    Last night there was a huge storm in my area and there was a lot of lighting and massive down pour of rain, stay with me honest I have a point.
    My G5 was on last night while I was asleep in the other room within visual range of the display. There was a lighting strike on my property about 20' from where my office is which is on the corner of the house. The lighting hit the tree and send an obvious surge of power into my house and zapped some electronics.
    Wireless router, cable modem, and thermal label printer all bit the dust - and the USB ports on the back of the ADC display. I jumped up from the sleep and saw the monitor light up out of screen saver because the house shook so hard. I ran over to the machine and tried to move the mouse and keyboard and no go since the USB ports are burned out, but the monitor was FULLY LIT UP. I have unplugged the monitor and plugged it back in multiple times, turned the machine off and let it sit and it still is working great minus the USB ports.
    My hunch is this... because of the dead USB ports which are no longer drawing any power, is it possible that the USB ports are the cause of the "short short long blink"?
    My screen went dead initially when it was in a deep sleep mode and NEVER came out of it until now.
    So basically what I am suggesting is that someone try and unhook the USB (if it is even possible) and see if that helps with their display - if not, I guess I am just lucky and my Apple Cinema Display is just lucky to not have fully bit the dust.
    -Jonathan
    Dual PowerMac G5   Mac OS X (10.4.10)   20" Apple Cinema Display (Clear)

    We can't answer that because that's going to depend on who you talk to. By the book, AppleCare covers defects and not accidental damage, so you could get a No answer if they determine it was not due to a defect. But realistically, sometimes you talk to someone who decides to use their ability to authorize an exception and get it fixed anyway. The only way to find out is to call AppleCare.

  • Apple Cinema Display 22" doesn't power on

    All - I have an old 22" Apple Cinema Display, model# M8149 that won't power on at all - no picture, no blinky lights on the front, just totally dead. I've tried it with a known function ADC capable video card as well as a known working DVIator external power supply - notta.
    Does anyone have any idea which part may be defective? I see lots of posts about replacing the inverter board, but in all cases, the posts indicate the monitor powers on, just no or blank picture. Mine doesn't show any signs of life whatsoever.
    any help is appreciated.
    thx,

    Are you sure that the connector on your laptop is a "AVG" ? Never heard of that one before. Perhaps it is a VGA???? If it is a VGA and your laptop graphics card is 16 MB video or less, it probably will not support the resolution of the 23 inch. As I can recall, it needs minimum of 32MB video ram to run it. Most older laptops will max out at resolutions of 1200X800. Find out what specs are on the card.

  • Bridge CS5 preview / slideshow not working on 27" Apple Cinema Display

    I'm using my 2009 (black key) MacBookPro and Mac OS X 10.6.7 running Snow Leopard.
    2.4 GHz Intel Core 2 Duo
    4 GB 1067 MHz DDR3
    Adobe Bridge CS5 works beautifully on my MBP, my photography workflow depends on Bridge.
    However, when I attach my 27" Apple Cinema Display and try to preview images by hitting the space bar I get a gray screen. Likewise, the slideshow renders only gray.
    It's not the "black out other monitor". I've cleared the cache to re-render all the previews.
    I've scoured these forums as well as the Apple ones, and the helpful folks currently at Photoshop World in Orlando advised me that, collectively, the kind people here know everything.   I know I can't be the only photographer who uses this configuration. I'd like to use the display for client previews/ordering.
    I would so appreciate any tips you may have for me; thank you in advance for your time.
    Warmly,
    Darcy
    http://hisandhersphoto.net

    Yes, thank you. I found that post - among others when researching before I asked. I tried all the suggestions in that one and in the others.
    My issue isn't low quality rendering in the preview and slideshow - my issue is NO rendering at all in slideshow and preview. It's just blank. Gray.
    I deleted the cache in my library and through the Bridge program itself to rebuild the previews. I tried the various options of "software rendering" on and off, and different configurations in the preferences and none seem to make the preview or slideshow work. I have all the updates from Adobe and from Mac.
    I tried importing the photos I need to show my clients (who are coming to my studio this evening!) into Lightroom 3, and the LR slideshow works. But using LR and having to import photos into it is an extra step not in my workflow.
    Ideally, I can make Bridge work instead of making yet another resource-consuming copy of these photos on this computer via the Lr library.
    So - current state is unsolved.
    Lightroom 3 slideshow and preview works, but isn't ideal since it involves importing the images into Lr. Since that works - would that mean my video card is acceptable?
    Bridge can show thumbnails on the 27" display but no preview or slideshow.
    Bridge preview and slideshow works perfectly on my 15" MacBook Pro.
    I'm so disappointed since I bought the 27" Apple Cinema Display this week and was told it would work with my computer "out of the box" - I was sure to ask several times, "so there's nothing else I need to buy or do to make this work with my programs? Just plugin and go?" and several times I was assured, "Yes... plugin and go."
    I sure would appreciate anyone who's made Adobe Bridge work with a 27" display. Thank you!
    Darcy

  • 23" Apple Cinema Display won't wake

    I have learned alot on these forums but seldom post. Thanks in advance!
    I have a G5 dual 2.0 Powermac, not sure what OS- I should know but honestly haven't updated it in a couple years. It's hooked up to a 23" Apple Cinema Display. I went to turn it on yesterday and the monitor did not come on. The comp appeared to be on, the normal sounds were coming from the machine- the eject button worked, the volume buttons were working, hard drive spinning etc. tried moving the mouse, hit space bar, etc.
    The LED light on the front of the monitor is on but no picture. I checked the monitor's manual and tried resetting PRAM, checked connections, made sure there was power to the monitor.
    Tried restarting the computer a few times, every time it was the same thing- starts up, normal operating sounds, Mac won't wake up.
    Called Applecare, they said the steady "on" light on the monitor indicates that it is not getting a signal. Probably a problem with the Powermac (which is not covered by Applecare). They told me to connect it to a different monitor and see what happens.
    I brought in my Dell 22" monitor and same thing happened except for a brief moment "Auto Detect Sleep Mode" flashes on the screen then it goes to sleep.
    So it seems that the Powermac is putting the monitor(s) to sleep right away at startup. Anyone know anything I can try?

    Hi-
    When the LED is "On", the display is "Off".
    http://docs.info.apple.com/article.html?artnum=301944
    You are sure that no flashing is occurring?
    http://docs.info.apple.com/article.html?artnum=88366
    Does touching the Power button on the side have any effect?
    How did you reset PRAM? Keyboard command?
    http://docs.info.apple.com/article.html?artnum=2238
    Try resetting the PMU/SMU:
    http://docs.info.apple.com/article.html?artnum=86760
    Can you boot in Safe Mode? To start up into Safe Mode (to "Safe Boot"), do this:
    -Be sure the computer is shut down.
    -Press the power button.
    -Immediately after you hear the startup tone, press and hold the Shift key.
    -Tip: The Shift key should be held as soon as possible after the startup tone but not before.
    -Release the Shift key when you see the gray Apple and progress indicator
    Can you do a single user boot?
    http://docs.info.apple.com/article.html?artnum=106388
    Does video display when booting from OS X install disk?
    http://docs.info.apple.com/article.html?artnum=300537
    Reseating the graphics card may be worth a try.
    G4AGP(450)Sawtooth, 2ghz PowerLogix, 2gbRAM, 300gbSATA+160gbATA, ATI Radeon 9800   Mac OS X (10.4.8)   Pioneer DVR-109, ExtHD 160gb x2, 23"Cinema Display, Ratoc USB2.0, Nikon Coolscan

  • Can I use a 30" Apple Cinema display with a new 27" iMac?

    I have a brand new iMac(27-inch, Late 2013), OS X Mountain Lion (10.8), i7 3.5 GHz, 32MB RAM, 4GB NVIDIA.  I will soon be upgrading it to Mavericks, if that makes a difference.  My understanding is that the resolution on it is 2560 x 1440.
    I'm looking at buying a used 30" Apple Cinema display.  I'd like to use it with my new iMac.  The only advantage for me would be that the 30" screen is larger and things on it easier to see (or so I'm guessing).
    I need to know if the 30" Cinema display would work with my new iMac, and if it would, as I'm guessing, give me a larger, easier-to-see screen.
    I currently have my new iMac connected to my old mid-2010 iMac as a target display (that old iMac has a minidisplay port--no Thunderbolt), and that works great.  I just want a larger screen.
    I called Apple support, and the tech rep wasn't sure it would work.  He seemed to think that the 30" Cinema displays were made with different connections.  Some had minidisplay ports (which he thought would work), and some a cord built into them that provided some other type of connection (that I guess would not work as far as he knew).
    Can anyone tell me if this would work?  Would my new iMac and its video card support the 30" Cinema display?  Would the result be as sharp and good-looking as my iMac's built-in 27" display, but only bigger (which is what I'm hoping for)?  Any advice is appreciated.
    I don't yet know many of the specifics of the 30" Cinema display I'm considering.  I know it is about 3 years old.  And here is a picture of the back of it:

    Yes, you should be able use the 30" Cinema Display with your new iMac without problems. You'll need a mini-DisplayPort to Dual-Link DVI adapter:
    http://store.apple.com/us/product/MB571Z/A/mini-displayport-to-dual-link-dvi-ada pter
    I haven't had the 30" myself to test so I don't know if there any caveats. Perhaps someone else here will have personal experience.
    Regards.

  • How to connect old Apple Cinema Display to new Mac Mini?

    Hello,
    I'm considering replacing an old Mac Mini with the new model, but I intend to keep on using my old Apple Cinema Display 20" with it. But i'm having some trouble finding the right conversor (it seems there isn't any from Apple...)
    Any suggestions?
    Thank you.

    If by "old" apple cinema the OP is referring to the aluminum displays of the later mac models, then yes, that's a no-brainer, the problem is that if the OP is referring to the "real" old apple cinema displays, which have a DVI-type connection with power included on the same cable, like the displays the former Mac G4 or G5 had, then he needs a ADP to DVI port, which in most cases it cost more than the actual monitor itself.. I guess the OP needs to specify what does it mean by old apple displays or throw in a link to an image..

  • How do i connect my Fujitsu Tablet + mac Pro to Apple Cinema Display 23'?

    Dear Mac users
    thanks in advance for your help.
    I currently own:
    • Fujitsu T 4220 (tablet) – Mobile Intel 965 Express – 60 Hertz – goes up to 1680*1050 (guess SXGA) – (it has the following other supported resolutions: 1400*1050, 1280*1024, 1280*768, 1280*720, 1024*768, and 800*600)
    • Mac Pro
    • Apple Cinema Display 23’
    What I would like to do is, please refer to the jpeg posted on http://www.flickr.com/photos/34831802@N06/3234336204/, connect – at the same time – my tablet pc and my Mac Pro to the 23' Apple Cinema Display and switch (when I need) from tablet to MacPro using the same 23’ ACD. Top would be to be able to switch for one to the other while they’re both switched on. Usually on 2 pc’s with vga I’d use a switch A → B (in the jpeg it would be I → E) with a selector.
    Have been reading different posts such as: http://discussions.apple.com/thread.jspa?messageID=8000641&#8000641 or http://discussions.apple.com/thread.jspa?messageID=6530475&#6530475 or
    http://discussions.apple.com/thread.jspa?messageID=7417258&#7417258
    + others on the net and have (hopefully) understood that:
    a) from Vga to Dvi I need a converter such as Geffen’s or similar
    b) the problem with ACD 23’ is that it has only 3 resolutions: 1024*640, 1280*800 or 1920*1200
    In the attached image I guessed a connection in order to connect – at the same time – both the machines to the 23’ ACD:
    1) my fujitsu tablet (i in the image) has to be connected, with a Vga cable (h), to the Vga → Dvi converter (g).
    2) from the Vga → Dvi converter (g) I need to connecto to the Dvi switch (c)
    3) easier is connecting the Mac Pro (e), since I only need a Dvi cable (d) to connecto to the Dvi switch (c)
    4) the Dvi switch (c) will then be connected to the 23’ ACD with a Dvi cable
    Now, my questions are:
    a) is the solution described above (Vga cable (h) to the Vga → Dvi converter (g)) a good solution or should I use, instead, a docking statione that comes with a Fujitsu Port Replicator (FPCPR65) which has a 1 x DVI-D port?
    b) Given the 3 resolution accepted by the 23’ ACD (1024*640, 1280*800 or 1920*1200), I do not understand if I can use my tablet through a Vga to Dvi Converter and at which resolution (my tablet has the following other supported resolutions: 1680*1050, 1400*1050, 1280*1024, 1280*768, 1280*720, 1024*768, and 800*600).
    c) Is there a way, also using an external video card or converter, to bring my resolution from 1680*1050 to 1920*1200? (the 16:10 ratio is in fact the same = WXGA (1280x800), WXGA+ (1440x900), WSXGA+ (1680x1050), WUXGA (1920x1200)
    d) Talking about Vga → Dvi converter (g), am aware of the gefen product. Can you please list some others that might be good as well?
    e) And how about the DVI switch? Any will work? Any particular suggestion?
    Thank you very much for your help.
    If you have any other suggestion, please let me know.
    Regards,
    Emil

    Noone to help me?
    No ideas?
    Thanks,
    Emil

  • Apple Cinema Display (20-inch DVI 2005) not working after 10.10.3 update

    I have an Apple Cinema Display (20-inch DVI 2005) that isn't working after installing the 10.10.3 update. The screen is just blank, and the power light just blinks a few times every 30 seconds or so. I use this as a second monitor with my iMac (27-inch, Late 2012). Any way to fix this? Thanks!

    Thank you for the update!
    Next I would recommend the Reset the System section of the following article for additional troubleshooting:
    Apple computers: Troubleshooting issues with video on internal or external displays
    Reset the system
    You can reset the Mac's parameter RAM and SMC. 
    Reset the resolution
    Start by resetting the Mac's parameter RAM. If the display does not come up, was previously set to an unsupported resolution, and still results in no video:
    Start up in Safe Mode.
    From the Apple () menu, choose System Preferences.
    Choose Displays from the View menu to open the preferences pane.
    Select any resolution and refresh rate that your display supports.
    Restart your computer.
    I would reset the SMC and the PRAM together, in that order one more time, then do the Safe Boot if needed.

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