Intel Mac :: 27" Displaying Random Coloured Squares On The Screen?
Jun 11, 2012
How many Mac users have suffered from the problem of small coloured squares appearing at random on the iMac desktop? They can be wiped by dragging a window over them but they will eventually reappear. I have discovered at least three other threads where this issue has been discussed but our local Apple store is claiming that Apple haven't declared it as a legacy fault. It would be interesting to hear how others have been treated when presenting Apple with this fault. At first they thought it was the GPU but they now think that it is either the logic board OR the logic board AND the GPU together!! Being charged between £480 and £650 to repair a machine that is less than 18 months old is a bit much from a company that continually boasts about the quality of its products.
Info:
MacBook
Pro, Mac OS X (10.7.2)
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May 11, 2012
iMac is a 2.15 GHz, Core 2 Duo 24 Inch.Â
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iMac, Mac OS X (10.7.4)
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Mar 25, 2012
Sometimes, when my iMac has been "resting" and I then move the cursor using track pad I get a stream of black squares on the screen. The more I move the cursor the more black squares I get. If I switch off and then on the screen is ok. This is an intermittent occurrence.
Info:
iMac, Mac OS X (10.7.1)
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Jun 20, 2014
New iMac at first of year has always locked up with green squares (1/4") randomly on the open window. I have to do a hard boot to unlock the screen. This may happen 5 or 6 times a day but I'm finding no pattern. It happens in any software, mail, internet browser, extra programs and only using what I need at the moment, including mail and internet, hasn't worked. I've run disk utility - repair disk and repair permissions multiple times to no avail. I've reinstalled the OS Mavericks and Adobe Creative Suite programs (Photoshop & Premiere Pro), no improvement. Â
I purchased a high-end iMac specifically to handle high-demand video editing needs. But this happens when checking email or browsing the internet too. Here's a listing of the system from a "Panic (system crashes) log" from the "Activity Report."Â
System Profile:
Model: iMac14,2, BootROM IM142.0118.B00, 4 processors, Intel Core i7, 3.5 GHz, 32 GB, SMC 2.15f2
Graphics: NVIDIA GeForce GTX 780M, NVIDIA GeForce GTX 780M, PCIe, 4096 MB
Memory Module: BANK 0/DIMM0, 8 GB, DDR3, 1600 MHz,
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Apr 29, 2012
My iMac screen has developed multicoloured horizontal lines in random spots across the screen..Is there a fix for this?
Info:
Imac intel, Mac OS X (10.4.11)
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Mar 27, 2012
My macbook pro just has a black screen with a small coloured circle on the right of the screen. It is frozen and wont respond to turning it off or on. It is plugged into mains power.
Info:
MacBook Pro
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Jun 28, 2012
not sure if one of the kids touched the keyboard or mouse but my screen is displaying in extreme zoom mode and I cant get it back to normal
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iMac
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Jul 29, 2010
I have a 10.4 iMac. Recently when using it the screen starts to pixelate with large random squares and effectively makes the computer useless. Either that or I get moving multicoloured flashing squares (very psychodelic)Also on booting up the grey screen with the apple logo has dark grey sqaures and then when it goes to the blue screen has a series of smaller squares top and bootom. The booting up stops at this point.
I have ran the disk doctor, but it doesn't seem to have made any difference.
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Jun 20, 2012
I just booted up me Mac and got a screen full of yellow squares. I can still see all the icons and everything seems to be working. Is my display going, or is there a fix?
Info:
MacBook Pro
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Mar 9, 2009
Apple delivered a refurb MP. And I just hooked it to my 30" ACD. Then suddenly the screen froze with digital artifact lines and squares. Only way to release it was to do a hard shut-down. And restart. Looks like its the stock standard graphics card. Is there any know probs with the ATI 2600. Also under Graphics/Displays. it just says ATI Radeon HD 2600 (rather than 2600 "XT") guess its the same card. Should I call Apple and get this exchange?
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Jun 27, 2012
I get a random door bell sound at random times, even if the IMac is off. What do I do?
Info:
Mac OS X (10.6.6)
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Apr 27, 2012
My MBPro, OSX 10.4.11 boots up to frozen blue screen with little pixelated squares.
Info:MacBookPro, Mac OS X (10.4.11)
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Sep 13, 2010
Whenever I try to start up my mac book pro I get coloured lines going down the screen. It then just shows me a large image of the power button with the message "You need to restart your computer. Hold down the power button for several seconds or press the restart button" I then do this and the same happens again and I go no further.
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Nov 23, 2009
Have had this macbook for just over a week, purchased off original owner who bought in Feb this year with Applecare warranty. Upgraded ram immediately to a G.Skill 4Gb kit. 4 days ago, computer randomly froze with horizontal coloured bar. Called Apple next day, the guy there told me that sometimes this happens, and that I should only be worried if this occurs ago. 4 days later, we are at this present scenario: In the last hour or so, has crashed 3 times. Programs running in common were iTunes and Safari.
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Jun 6, 2012
when I turn on iMac I got white screen with grey coloured flashing folder sign,a question mark on it, that's it.
Info:
iMac, 2006 model
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Aug 26, 2014
I'm running a late 2009 iMac, 2.8 GHz Intel Core i7 with 8 GB memory with 27 inch ATI Radeon HD 4850 512 graphics card running 10.9.4 OSX.
I will get spontaneous crash of the system that causes small blue squares over the entire screen. The problem will resolve after 1-2 restarts. I ran the system diagnostic disk and found no problems on the long and short versions. It is an intermittent problem as the display and system are running fine now but daily will have the crash occur. Once the spots are present the computer will be frozen with no response to keys or mouse.Â
Info:
iMac (27-inch Late 2009), OS X Mavericks (10.9.4)
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Jun 21, 2012
Every few weeks my iMac will suddenly freeze, the screen going black or white or pink etc. The only way I can get the computer back is to hold down the power button to force a shutdown. Then after a restart everything is OK for a few more weeks. Usually it occurs when I am on the internet. I click on something and suddenly the computer is frozen. I am on OS X 10.6.8 and usually use Safari. Ironically when I opened this forum 5 minutes ago there was a similar sounding problem at the top of the list!
Info:
iMac, Mac OS X (10.6.8), FCE 4 + FCS 3 . . . Little Knowledge, Many Opinions.
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Jul 6, 2010
I have a Sony Bravia 32 inch HDTV and would like to display movies downloaded to the iMac on the TV. TV has HDMI inputs as well as a USB socket. Can anyone tell me whether it is possible to achieve this aim?
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Aug 30, 2009
Anyone else having this issue or know how to solve it?
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Nov 8, 2009
I'm trying to get Word for Mac to display two pages across the screen.
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Nov 1, 2010
The screen on my macbook (07 White 13" Macbook) is only displaying the top half of the screen.The bottom half is filled with colored vertical lines.On occasion it will clear up partially but mainly stays this way. I have reset the smc and pram. I have also disassebled and reseated the connection on the back of the lcd screen only.I have not reseated the connection wher it goes inside the computer body itself.
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Feb 13, 2012
Lion 10.7.3
iTunes 10.5.3 (64bit)
2.4 Core 2 Duo  Â
4GB RamÂ
Just purchased DeadMou5 4x4=12 (Deluxe) and the album plays fine but interactive LP is just a black screen also. Â
tried to re-install iTunes restarted Mac reset PRAMÂ
Info:
MacBook Pro, Mac OS X (10.7.3)
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Mar 25, 2012
what is the best process for displaying my screen on an HDTV?
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macbook pro, Mac OS X (10.6.6), 250 gig solid state drive
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Apr 29, 2012
I am having more issues with my MacBook Pro and it's really starting to irrate me, because I know if I take it to the Apple Store they aren't going to do anything about it. But anyways, lately my screen has been turning all kinds of colors. For example I'll be watching a video on YouTube and all of a sudden my screen will go solid white. And the only way to fix it is the restart by holding down the power button. The second time it happened it turn black. And each time it happens a different color appears. So far I've had white, black, blue, purple, green, and red.
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Info:MacBookPro, Mac OS X (10.7.3), Mid-2010
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Jun 24, 2012
Just got my new Retina MacBook Pro... when I try to get videos to go full screen in anything (youtube, cnn, etc.) only the top left 1/4th displays the video, while the rest of the screen is left blank and turns white. Using google chrome canary. What can I do to make videos go full screen?
Info:
MacBook Pro with Retina display, Mac OS X (10.7.4)
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Aug 7, 2009
I have a 24" 2007 iMac, the first aluminum ones, 4Gb of Ram and a recently upgraded HD to 1Tb (from a 320Gb failed drive). Recently, I have noticed that under some active usage, such as playing World of Warcraft or Excel, the screen will start to turn completely off for 10 seconds, and then back on for 10 seconds. It will continue to do this for about 3 hours, turning on and off every few seconds or 15 seconds. It will mostly turn completely dark but would also sometimes flicker. The curious thing, is that if I continue to keep playing, the screen would cease doing this after about 3 hours and then be completely normal and fine, but the next night.
The symptoms would repeat itself, and would consistently go away after active usage (3 hours or so). Imagine this, as if the iMac itself needs to be "warmed up" for 3 hours before normal usage. It would also appear that if I hit the machine (or tap it), this may sometimes bring a dark screen back to life for a few seconds. I plan to bring it to support, but I just want to get some ideas from you guys as to what this can possibly be.
Some of my guesses:
1) It cannot be software as physically hitting it or my dog barking would affect the rate and speed of the random turn Ons and Offs.
2) It could be a loose connector from my recent transportation of it while upgrading my HD, but then why would it become normal after 3 hours of usage?
3) Maybe something to do with RAM or video RAM? It is faulty, and thus only prolong heavy usage would "run it in" for the session? After not using it for a while, it goes back to its failed state?
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Jun 11, 2010
My screen periodically starts flashing and getting huge white lines that run down the screen when I play games (only have crysis maximum edition) but then it stops and goes back to normal. Ive noticed that it doesnt happen all the time, and not at certain moments in the game (i.e. happens at one point but doesnt happen again at that same point a different time) and it will stop if i go and look only at a wall. Is this normal or is my MBP F'd?
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Mar 8, 2012
The screen on my Macbook Air just recently started to periodically display flickering lines. They are multicolored and stretch across the entire screen. Hardware test was ok, and console not reported any issues. MBA is "late 2010". Warranty ended January!
Info:
MacBook Air, Mac OS X (10.7.3)
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Dec 5, 2014
My iphone 5S is stuck on a screen displaying the itunes symbol and a charging cable. I tried connecting it to itunes and updating it to the new software, and backing it up but it keeps saying unknown error 4005, Also when I first tried backing up my phone on my computer it would begin the processes then half way through it would say IPHONE has been disconnected, now it won't recognize it or anything.
Info:
iPhone 5s, iOS 8.1.1
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Sep 15, 2010
I've had my 27" iMac (3.06GHz) for a few weeks now and yesterday I noticed some weird artifacts appearing on the screen, very randomly.
They will pop up all over the screen but if I "Show desktop", they will go away for a bit but sometimes reappear again in different areas of the screen. I restarted the computer but that only temporarily fixed the problem.
Anyone know what's causing this and how to fix it?
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