iMac 27" Late 2015 BLACK SCREEN PROBLEM FIX
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- čas přidán 23. 02. 2017
- Do you have a 27 inch iMac that all of a sudden goes black screen and totally unresponsive? This happen to me too and eventually, the iMac wouldn't even turn on!! (or at least the screen wouldn't). So after tryiung some things and having what I thought was smoke come out the back, I finially fixed it! So unplug the imac, remove the cover where your RAM is. Eject the RAM. Plug back in the iMac. Power on the iMac with the RAM ejected. You'l here a long tone and might see a error. Power off your computer by long holding power button. Unplug your computer. Put RAM back in, hold down power button as you plug in the power cord. Worked for me and I have not experienced any black screens since!
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Just wanna say I frickin love you man. Spent weeks trying to solve this problem as a studio musician and nothing worked until this. Huge thanks!
So glad it helped!!!
I tried everything to fix this and nothing worked until I tried this. Now working perfectly, thank you!
I too have a late 2015 iMac 27” & had just updated to Catalina. I had a black screen afterwards. I tried doing to command, option + p & r thing & nothing.
This was the ONLY thing that worked + I got to see how easy it is to upgrade my ram. Thank you! 🙏🏼
Thankyou - middle of a job in the studio and the black problem occurred. I followed your procedure and it all went exactly as you described and, so far, the problem has not recurred. Thanks again.
Thanks for posting this tip! I was running out of things to try, then I finally found your video. While your tip worked the behavior on my 2020 iMac was a bit different. I popped the ram tray out, pressed the power button while simultaneously plugging in the power cable. The fans started up like an airplane then I pressed the power button to shut off the iMac. I pushed the ram tray back pressed the power button and the Apple Logo finally appeared. I then restarted in Disk Utility mode and ran a repair on the volumes, containers, and then disks. I then rebooted (pressing command+ option + P + R) to clear the VRAM, then rebooted again (pressing shift + control + option) to clear the SMC. I rebooted then booted all the way up to then performed a shutdown. I’m now booted all the way up successfully and upgrading MacOS to the latest version. Thanks again for sharing this fix!!
My imac went completely unresponsive during a security update (2020-005 for High Sierra). Unresponsive to any USB input, including keyboard. Tried everything under the sun, your solution is the one that worked. Thank you!! Saved me a lot of trouble. One thing to note though: it didn’t make any sounds and the screen didn’t turn on at all, I honestly thought it might not work. When I put the RAM back it, it took a while but it booted and now it continues the update installation. We’ll see how it goes after it finishes.
Thank you! This has been driving me mad for months. Tried all the other suggestions then stumbled on this video. Worked on my 2012 iMac 27".
This is great that you helped so many people, I'm going to try this on my father in law's 27" and hopefully it will work. I'll be back for a second post next week. Thanks 👍🏻
Ur a Freakin hero! Thought my 2012 iMac had finally given up on me. It’s was going black every 1 or 2 min. What a save! Worked beautifully! Many thx!!!
I was having a similar but different issue with a late 2015 27" iMac. I use it as a second monitor and occasionally it would revert to a standalone computer. When I'd try to reset it as a monitor (Command +F2) it both machines would react, but the monitor iMac would stay black. I tried your solution and so far it has worked!!! YAY! Thanks!
I'm from Mumbai , India .... I recently got into blue screen problem and Ur video saved me from the next scam of USD 600.... Blessings to you brother 🙏🙏🙏
Oh wow, I thought I knew most things when it came to iMac's, but this worked for me, and was a new fix that I never heard of. Thanks so much! ❤
2010 Imac 27": have been through many of the other recommended reboots for this problem, but your solution worked. Many thanks, you saved me great expense.
unfortunately, the fix didn't last
Did you ever find a solution that finally worked? I have a 2010 27” with same problem. Tearing my hair out.
Outstanding! I was at my wit's end after trying everything I could find online (keyboard options, reboots, re-install OSX, disk repair etc.) about this intermittent black screen on my iMac. Your "cleanout" solution worked beautifully. My Mac is an eariier model 2013, but the procedure with the power cord worked just fine.
Thanks for posting this, I was at the point of parting with $$$$ to get a professional fix. Saved me heaps of money. Much appreciated.
Lesson learned; keep the vents at the back of the Mac clean and free from dust!
Thank you for this! My black screen problem has gone away for now after trying this fix.
It worked for my 2013 (later year) iMac 27inches.
The machine got stuck on Safari, then got black screen.
It was repeated in a couple of days!
I googled and found your video.
Thank you so much!
No dust blew out but it did work:)
Thank you so much!
I just did it a couple of hours ago:!
Even after 6 years of uploading the video, thanks for saving my months of work !
Thanks a lot, man. I don't normally trust CZcams tutorials, but it worked 100%. Thanks for taking the time to upload.
Thank you ! My heart had stopped but now both the computer and my heart are back on.
This solved the problem for me. Thanks very much for posting this! You are a star😊
Brilliant. Nothing worked until I popped the RAM out and works perfectly. Thanks so much, you are a star.
THANK YOU SO MUCH! Oh my gosh, I thought that I was going to have to take it in and get it fixed. You probably saved me from being scammed! This worked!✌🏾❤👍🏾
Thanks. This addressed my black screen. Had to restart using command-alt-p-r to get OSX to start properly.
same here
Same
I followed your instructions and it worked!
Thank you, thank you.
Now I’m leaving my iMac on, using the screensaver, just in case.
This happened this morning and would boot with the chime and despite zapping the pram and resetting the smc behaved the same with no video display on the iMac display or any of my two external displays. Strangely enough your video worked. And I'd reseated the ram within the machine within a month or two at most previous. I also blow out the air vents with compressed air regularly because I've seen buildup of dust causing greater processor throttling noticeably.
Holy shit - this saved a 2019 27" 5K iMac - I removed the display for upgrading to an SSD - reconnected the screen and got no signal at all on the display (total black screen and only two green LEDs on the motherboard. I have reset SMC, and tried to reset PRAM (does not work since there is no boot sequence).
I opened the damn thing again and checked all the cables and connectors under a microscope but could not find any damage....
I always had the feeling that there was a reset problem on the motherboard but did not know how to reset it completely...
This "Eject the RAM. Plug back in the iMac. Power on the iMac with the RAM ejected" I´ve done it twice and now the damn iMac, which ate away 2-3 hours of troubleshooting time runs again!
Thank you so much for posting this video, and saving a couple of big bucks and hours of sadness.
Just did a similar fix with my iMac. Same issue, black screen, wouldn’t boot up, tried every startup trick and nothing worked. Ended up ejecting the RAM slots on the back and hitting it with an air duster. Tried starting a couple of times and same issue. It wasn’t until I held Cmd+Opt+P+R on startup, that it finally decided to boot up. Got a LOUD startup chime and it started properly. Working fine now.
You are a genius … this is the only thing that worked for me !!!! Thanks bro 😎
Combined this with his option and it worked. Thanks guys
This has been happening for a little over 4 years now it works thank you so much
thank you! tried this last week and so far it is working fine again. thank you for sharing!
Thank you. It really helped. I couldn't believe it but it actually worked. my beloved Imac27 late 2011 lives again. Thank you.
You are the man, my friend! Lifesaver. Worked just like you said. Thanks!!!
My 2017 27'' iMac finally alive.. Thank you so much!!
My one You can hear the sound but the screen is black how do u fix it?
did you fix it?
Hey thanks for reminding me about this, I just replaced my hard drive and was thinking it was the DisplayPort cable but this saved me a lot of time
Δούλεψε μια χαρά στο "πεθαμένο" imac 21.5 (mid 2010)! Δεν ξανασυνάντησα πρόβλημα. Σημείωση: ο Τεχνικός ήταν σίγουρος ότι είναι ο connector της οθόνη ή η μητρική ή και τα 2. Γλύτωσα ταλαιπωρία και ευρωπουλάκια. Thanks Bro!
I hacing the same problem but my mac doesnt have the ram slot on the back. Any fixes?
This just helped me fixed my late 2012 iMac. Thanks for the video.
Man, I own you a lot!I just tried your trick and my late 2013 27” IMac is back in life, god bless you bro.
Dude, you’re a lifesaver!
Question, was this the BACKLIGHT not working? or nothing at all on the screen? I have the same one but I'm just missing my back light. Any help or test would be greatly appreciated!
Thank you so much for posting this! I was just about to take my iMac apart but tried your solution before hand and it worked! My computer is an iMac Retina 5K 2019, so if anyone is wondering if it will work on later models...it does.
Thanks again!
Worked for me on my iMac 2017. Different symptoms for me. I upgraded the ram and it would turn on but screen would not. The loud fan did clean the exhaust very well haha.
Ok, on my first try i hadn't pushed the ram cards in far enough. It's now 2 hours since following your instructions and no black screen so far. Fingers crossed. Thanks.
i hear the beep but my computer doesn’t turn on i’ve tried everything in this video and tried to restart with the mac keyboard what do i do
Did you wait till it stopped beeping? Mine was for ages so I stopped it then did next step. Didn’t work
Thank you very much! So far all working after reinstalling the memory/ram.
OH MY GOD THANK YOU SO MUCH MY ONLINE CLASS WAS SO CLOSE TO STARTING!!
This worked for my older 2009 iMac 24"- Thank you!!!
Ok I do this step by step and when I got to last stage and powered up while place power cord at same time it powered up with white screen and now I hear a fan, which i never heard. What is this? Before I did any of this Ram I boot the computer up and see. My login name and password and don’t see any of those. This is is a 2011 I Mac. Any answers please?
Just, 10 minutes ago, tried this on my iMac 27" mid 2010, Seems to work :) Before computer was randomly blacking out at any time for some duration, problems starting after a power outage. This fix seems to make a difference. I'll update after some days. If this works I owe you a beer!
One week later : This fix surely cured my Mac! Where do I send the beer?
Please ... How you did .....where is the ram.
on my imac 27 2010 i cant take off the ram coz its all inside in. unless ill open the whole mac. and still all black. 😞
@@revinlim It's the middle grid under your iMac. Three screw to remove, that's it.
LifestyleimagesMTL I found it but don’t know what type of screwdriver - can you help ?
It didn't help here with mid 2010 27" :-(
This seems to have worked! (so far) I may replace the ram.
Cooool, Many thanks.... had this annoying issues for weeks.... pulled the Ram as you suggested and vuola!!! Worked, thanks dude! :)
Thank you so much for sharing this 🙏🏽
worked great for my iMac 5k 2017... Thanks a lot!!
Thanks dude. I was getting frustrated with my iMac and this seems to have fixed the issue.
Sweet! Should work for a while but I ended up switching out the ram and it hasn’t happened again.
Thank you! Nothing worked no matter what I did, but this fixed the problem!
Hello my imac was sounding 3 beeps,isolated to one ram causing the 3 beeps.Left the one ram out(have two total).No beeps,but my display is still black.Suggestions ? Thank you.
Daaaaang!! You rock! I depend on my computer for work. I'm running right now without a spare, eeeekkk! My computer started acting up a couple weeks ago and this fix, fixed it... Thank you!
My iMac has black screen but I know everything is working good beside the black screen .
When I press the power button for 2 -3seconds (while my mac is on already)I can see for 1 second the bringt screen with my normal desktop. 1 time i‘Ve Pressed Shift key and Also for 1 second I saw the screen. I made the ctrl+Opt+P+R few days ago and it worked until the first „sleep mode“ since then nothing helps. What should I do?
I took the ram out also and clean and did all the steps from video
I unplugged the computer for like a month or two and tried to turn it back on and it worked. nothing else had worked but I thought id just keep it in my room and see if that would work
I unplugged it from the outlet for ten minutes. Restarted and everything seems okay. Thanks.
This is what happening to me right now and I’m getting crazy!
Buddy on behalf Delcastgroup in Naples FL, we love you!!!
Do you allow the fan to run until it shuts off?
the 2017 iMac doesn't have the plate in the back. any ideas? the command opt PR keys aren't working for me
This was a life saver. Thanks man. 🔥🔥🔥
Thank you so much! 2nd time this video has helped me 🙏🏼
That’s very interesting, who told you about the solution? Of course I’m having this problem because I’m looking up a solution for mine but the solution for mine is to turn down the brightness on my monitor because if I turn it up to high, the screen blacked out and also in order to get the screen to turn back on you hold down shift control and hit the eject button. No need to do hard resets. If your issue is different than mine then these Macs were just doomed from the start.
Worked for today. Curious what the underlying problem is?
Dude. Yoooo. I want to buy you a drink! Thank you so much!
I have a 2010 iMac 27”. Could the GPU card be bad if I only have 1 LED on the diagnostic board when plugged in, and already replaced the power supply unit, and still when I press the power button, i get nothing, no chime no fan its completely dead
Worked for me! Ur a lifesaver! Thank you so much!
I have a late 2014 iMac 27" with 5K Display. I've been having this exact issue for months. I took it into the genius bar a couple months ago. They couldn't find anything wrong, but they did say that I have non-Apple Ram installed, and suggested I remove it, but gave me the option. I had them leave it in. Maybe that's the problem? Do you have non-Apple ram? I'll give your fix a try. Thanks!
It somehow fixed it thx
But rip the remote fan control so now the fan doesnt slow down its like full throtle
And i cant display the temperature of the cpu and stuff
And it says reset smc should i do it?
I really hope you’re still able to see this. I have the issue with the black screen appearing, while the system seems to be operating (I hear the sound of the system turning on). I followed all of your steps, and it didn’t work. Just bought the iMac 2. Hand, and used it for about 6 hours until the screen became black. Do you think I have to buy a new Mac, or is there a possible solution? The iMac is from late 2015
Thanks so much! You saved my iMac and I!
Works like a charm now..... Thanks so much mate
Sir Plz! Help Me,I'm Using iMac Mid 2009 Model.... It Doesn't Power On Sometimes It Run Only Fan
YOU SAVED MY LIFE! THANK YOU SO MUCH!
3 24/2020 Mid2011 27" iMac halfway to fixing I think lots of fine dust near Mory holders after fan came on full blast and 3 beeps after cleaning memory chips found all working by testing them in a working iMac mini replaced into 27" iMac when turning iMac back on black screen 1 beep which I think is a bad 3.5 HD constantly clicking from having plugged and unplugged it so many time with the power on. Ordered a Torx screwdriver set so I can go deeper into the 2011 iMac and replacing the HD with an SSD 500GB, hoping that will allow for booting and no blackout screen when booting ( screen will turn on for a split second if I hit a key while booting then black again. Next, if it boots will have to figure out how to get an OS installed to the SSD HD.
Thanks man that worked! 2013 imac
I tried every trick in the book. Forced to call Apple, still no results. They told me to bring it in to Apple for a look-see.
So I came across this video and figured one work trick would not hurt before I drag it to the Genius Bar. Well much to my surprise my 2009 iMac is now back to its reliable self. Excellent solution
- so far!
How has it been since then? Any more blackouts?
Thanks! Worked for me when I pressed Command-Option-P-R after putting RAM back in and powered on as usual. (Only Command-Option-P-R before unplugging RAM did not help)
gallico same
I did the exact same steps and it actually worked. I was surprised that it worked cause I had the 2017 iMac 27inch model and I thought it wouldn’t work. Thanks man, you saved me.
🙏
I did this but now it's just not coming on and when I hold the power button it makes the fan sound and then stops.
I have a IMAC 2011 27" with the same problem, try to follow what u did, but I don't see the plate to the RAM in this model !!!
Anyone know what to do with a 2014 21.5” screen???? I had the same problem with the fan spinning up, I can’t take out the ram though because it’s a 21.5” model
I haven't had the issue myself, sounds like your ram wasn't seated correctly, or it shifted due to heating and cooling over time. Thankfully the RAM wasn't bad and you were able to fix. Thankfully in addition it wasn't your logic board . Maybe also blowing the dust out also helped with heating, if the exhaust was blocked by the dust, or it was on something that generated too much heat.
I have only had two macs out of all the one's i've owned that actually required warranty work.
I’ve tried EVERYTHING I’ve seen on the internet about this issue. You have finally provided the answers. I ended up replacing the stock ram with the new ram sticks. Then I put the original stock ram sticks in the empty slots. BOOM! It worked and my Mac booted up.
My imac 27 2011 screen goes black while imac is still working ( Screen sharing to macbook still working too) .. when I press power button for 1s and click on the mouse screen came back on (sometimes i need to repeat it few times) ,,, I've done PRam and nvram reset ,imac was cleaned Gpu ,Pcu termal paste change but did not helped ... Any advice ? ( Screen sharing to macbook still working during black screen on imac ) .. Any advice ?
Hi guys. When i start m IMac is loading half of logo and after turn Black, can you help me? Ty
What if I have an older Mac pc and don’t have that panel at the back to eject the ram???????
I tried this but mine boots up half way then shuts off and coming back on to do the same thing!!! Any other suggestions?
U a genius. Fo real thank u man just saved my life 🙏🏻✨💫🖤
You sir are a lifesaver! Kindest regards always
does it means when my screen goes black my ram is bad it does the same as yours and i did what u did un plug an hold power botton and at this moment my fans are working none stop
It actually worked. Brilliant. Time for a new machine I think.
What if there is no beeping noise and the screen remains black but the fan is still running? Does that mean the HD has died?
Even as this is an old video! But you also saved my life! My logic board of an 2014 late iMac broke. So I got a very cheap logic board fron an iMac 2015. I swapped it in and the first boot got a chime and an Apple Logo. Yes it worked with the Display of the original late 2014 iMac, even if some people (especially from Apple) stated that this will not work.
I couldn't boot into my formerly installed NVME-SSD (from the 2014 iMac), so I hought there might be a problem with the installation. Couldn't go into the option mode to choose a boot stick, couldn't go into the restore mode. Then resetted the NVRAM with unplugging, waiting for 30 seconds, pushing the power button for more than 5 seconds, put in the power cord, chime but again no chance to get by with booting to the stick. OK tried resetting PRAM. Bam after that no chime, no screen, no nothing. Again resetting NVRAM, bam loud FAN-Noise no chime, no screen.
Then I saw your Video. I thought to myself " this will never fix my problem, but what do I have to loose?". OK took out the powercord, ejected Ram, put the power cord in, loud beeps (now some reaction yeahhhh). Put in the power cord, used the power-button and the system got a Chime an Apple-Logo and just booted into the Catalina System without any issue.
Hail to you man I am so happy! Many many many thanks to you!
Greets René from Germany!
Glad to hear it!!!
@@JRESHOW So if you still have your iMac 2015 and your screen is broken, you can just swap it with a much cheaper late 2014 Screen (not mid 2014). Again thank you so much, I was at the point to just forget about this iMac (throw it out of the window) and just use my modded 2011 iMac (Nvidia Alienware hacked Graficscard) further on 🙂
This thing really worked. The electricity went out and when it came back my second display wasn't being detected and I was having the back screen issue too and this fixed it! Thanks!!!
Amazing!!! This actually worked for me! Thanks!!!!!
🙌🏼
My computer still doesn’t wanna turn on...
I followed all the stuff and it stays black and makes no noise. What do I do now?