Imac freezes with horizontal green lines

My Imac crashed the other day with green lines horizontally across the screen, the mouse would react and move around, but could not open any apps. We took it to get repaired at Core Mac and he said it worked fine. We brought it home today and it crashed again. I think it may be the graphics card? Can anyone help?
Thanks
Not sure what model as I cannot check right now.

I suspect a hardware problem. I'd recommend taking it to your local Apple Store or AASP. You can try to run Apple Hardware Test though in Extended Mode.

Similar Messages

FCP/Compressor keep exporting horizontal green lines near the top and bottom mattes. What do I do?

Hi everyone,
I'm trying to export a:
1920x1080
29.97
Interlaced
ProRes 422 HQ
to:
DVD Best Quality (90 minutes) in Compressor
Quality all the way high
Mpeg-2
in Final Cut Pro and/or Compressor (both so far export with the green lines) and so far it has been to no avail. They show up right on the edge near the mattes. Most forums talk about a vertical green line but I am having problems with horizontal lines near the top and bottom.
Any ideas? Thanks.

If you are sending your file via share to Compressor I would try this instead:
Export a QT reference(not self-contained or using QT conversion) file of your sequence to your desktop.
Then:
Turn on frame controls in the MPG-2 setting and set all to best. Changing all settings to best will increase your render time greatly. You may want to do a :30 or 1min test.
In my experience Compressor can be inconsistent with HD to SD DVD MPG-2 conversion. Sometimes it works wonderfully and others times it does not.
I have had success with having FC do the SD conversion first.
Create a new 16x9 SD sequence
Add HD seq to SD and render
Export SD and then compress for DVD.

IMac freezes with beachball

Hi,
I sometimes have a situation where, during use of Logic, all of a sudden my iMac freezes with the famous beach ball. Only the mouse pointer still moves when moving the mouse, and the harddisk temperature monitor util still shows changing temperatures every couple of second. I have the impression that the harddisk become unaccessable; it happened twice while bouncing a song. A couple of months ago I had this lockup situation a couple of times in 2 or 3 days, and since it hasn't happened until today. Weird! The only solution is to press the power button for 5 seconds (at least, couldn't get it to life any other way).
Is this a known Logic issue???
By the way, the HD temperature is around 55 degrees Celcius. Is this normal??
Thanks, Jaap

jaap wrote:
Yep, only with Logic so far...
You might want to boot from the install DVD and run a verify check to see if there are any errors on the drive, also would be a good idea to repair permissions.
Doubtful it's the drive temperature... it could even be the program that's monitoring the temperature causing the problem. Logic punishes almost every section of a computer, memory, processor, hard drive...etc. It's best to not have anything else running in the background if possible.
How much memory do you have?
Also... if you're working with a lot of audio tracks, the system drive in not your best choice for recording.
OSX does a considerable amount of disk writes on it's own.
pancenter-

When i watch vids on any website i see the same vid twice. One on top of the other with a green line dividing them

When i watch vids on any website i see the same vid twice. One on top of the other with a green line dividing them
== This happened ==
Every time Firefox opened
== Today

First of all, Firefox support SUCKS! I am looking onto Opera or Chrome.
Here is my solution. I have WinXP 64 bit with a Nvidia card. I had the same issue and all I had to do is update the video drivers and it fixed the problem. Try this out.

IMac freezes with every other click

I am new to the community and hope to find help for a big problem.
I run OS Yosemite 10.10.1 on my 2010 iMac 2.93 i7 (upgraded to 12GB RAM a year ago).
For the past 5 days it gives me the colorful wheel of death almost with every second click. I cannot open a program or search a site or move a file without the iMac freezing up. Just writing these two sentences, it froze twice for about 45 seconds, which is the average, but it can take up to 2 min before the Mac responds again. I have not changed anything on my iMac knowingly in the past few weeks.
I closed every program I don't need, shut down dropbox, Google Chrome, and any program I can imagine slows down processing speed. I cleaned my desktop, made sure I have 20% space on the HD. Since I am always suspicious of the Microsoft Office programs, particularly Outlook, I logged in with a different user name that does not use these programs. Nothing helps. I used Magician, Disk Utility, Activity monitor to see if anything looks odd, but all seems normal.
I am not that Mac literate, so I just discovered the Console that seems to log error events. This is what the last 5 min look like; it tells me I had 4000 events logged yesterday. Is this normal?
Please if anyone can advise what to check, change or do to stop this nuisance that would be awesome.
Thank You!

Basic guess:
Under utilities you have to run the disk doctor to see what is wrong with either your hard drive or backup drive - stop time machine first & check the backup drive first as that is the one that may be damaged.
Hopefully someone is online now who can post the details -
Another option is to take it in for repair to apple store or authorized apple dealer (if on warrantee of any kind)

Quad freezes with horizontal flashing

My Quad freezes in several modes; in several programs with horizontal flashing that preceed the freeze. Once frozen, the pointer will move with mouse control but everything else is frozen, nothing responds to the mouse or the keyboard or special key combinations. All I can do is hold the main power button until the machine shuts down. Wait and startup, everything then runs until the next freeze while in one application or another.

Memory problems are very difficult to "catch in the act". But there are some Red lights in your Mac next to the memory slots. Next time it misbehaves like this, open the side door (there is no Interlock and it will not power off if you open the door) and see if any of the error lights are on. That may point to a particular memory module.
There may also be some error messages from the time of the problem in the System Log, which can be inspected with Console utility.

Crashing with horizontal colored lines on screen?

I've been having a serious issue with my MacBook Pro 13" recently. It started as different occasions of randomly crashing, and then progressed into crashing while horizontal colored lines flicker on the screen. The only option to fix this is short term, I will restart my computer only to have the lines show up ten minutes later and then have to restart again. This has been a nightmare for getting any work done, saving files, etc. Sometimes it crashes three times in the span of thirty minutes, and at that point will not even turn on but will instead trigger three beeps to sound, which I know is a sign of bad RAM.
I actually invested in completely new RAM to see if I would fix the problem, upgrading from 8gb to 16gb. No luck, I still had crashing. I also completely erased my hard drive and performed a system restore. Also no luck. The lines and crashing are back.
Has this happened to anyone else before? I'm worried this is an issue that I won't be able to fix, and I'll have to buy a new computer entirely which is super upsetting considering I only bought this Mac last year.
Here's an image of the screen in all it's messed up glory (featuring adventures in online dating):
http://tinypic.com/r/m9un21/8
I would appreciate any help!

I bought my macbook like a month ago and already sent
it in for repair once. Now I have another problem.
When ever I turned on my MB the screen just shows
like a thousand multi colored lines and stays that
way. The night b4 this happened the battery ran out
and I was to lazy to charge it, so i just left it
dead over night. When I woke this problem took
effect. Anyone know what the problem is???
thnx in advance,
It's a bug in OS 10.4.7.
http://discussions.apple.com/thread.jspa?messageID=2712853&#2712853
-Bmer
Mac Owners Support Group
Join Us @ MacOSG.com
ITMS: MacOSG Podcast
 An Apple User Group 

IMac Feezes with Pink/Green Pixel Boxes

My mid-2010 iMac freezes after random strips of green and pink pixel boxes appear on the screen (see image below). Has anyone else experienced this and managed to fix it?

What machine did you recently update to Yosemite? Are you also on a mid-2010 iMac or something else?
I went to Yosemite right when it was released and I can't remember if I had this problem before then. It would be nice if it was just some weird and easily fixable software issue and not a larger hardware issue.

IMac freezes with Halo UB game - after graphics firmware update

Hi
The graphics firmware update works good - the couple of things I found to freeze it work fine now.
But I have found one way to get the freeze and black screen plus the ASIC error in the system.log.
Open Halo UB 2.0.2 and set the video options to use 1920x1200. When I have it at 1344x840 or whatever, the game is fine.
But when I try to set Halo UB to 1920x1200, I get the freeze thing. Halo says it has to test the new video settings and says to hit escape if no dialog appears. Once I accept that, then the screen goes black and the freeze hits.
So I'm happy that everything's working good for all the other normal causes of the freeze. Hopefully Apple can now track down this issue.
Anyone else out there have Halo UB to try this out?
Maybe it's my Halo UB install. Mine was a fresh install this morning though.
good luck!
let me know...
thanks!

Freezes with Jedi Academy as well, freezes after iMac update, 10.5.1 install, Firmware Update (which i had to do with Pacifist)...
just Freezes and everything needs to be restarted, haven't tried the HALO thing yet, not sure if i want to push my luck...
r...

Mar 09 iMac with vertical green lines

I wrote a post regarding this issue in July and have just now had the chance to take the iMac to the Apple Store. Didn't just add to the post because it has been archived so I'm updating with a new post. I've read lots of posts regarding earlier Intel iMacs but no new gen machines. Has anyone seen this in 2009 iMacs? or is mine "special".
My almost brand new (Mar 2009) iMac has been acting up. Beginning about a week ago at the gray startup screen there has been a band of green vertical lines showing up. The band is about three inches wide and runs from top to bottom of screen. Disbursed between the lines are continuous bursts of green static similar to snow on an old TV set. The lines disappear when the desktop comes up.
Then after a few minutes to a few hours after startup depending on how long the iMac has been turned off the lines begin to appear in the same field on my desktop, usually intermittently dispersed across the three inch field (not as solid as at startup).
I took it in to show a Genius at the AS this afternoon and as soon as he saw the startup screen he said they should have it fixed by the end of the week. He ordered a new board and a new screen for the iMac saying if the board doesn't fix it he'll have them put in the screen to see what that does.
Great service, I'm bummed about the issue and having to drive all the way to Scottsdale and back from Flagstaff. Hope this fixes it. They say they will call me when it's ready to pick up.

Yeah, I know, but all the third party AASPs the Apple Phone Rep ID'd for me In Flagstaff are, from personal experience, bums.
One took two days to determine if my G5 iMac (it was just a year and a half old with bad logic board and PSU caps and covered by Apple Care) was eligible for repair under Apple's extended repair program. They incorrectly decided it wasn't, even though that didn't matter due to the Apple Care coverage.
The other place actually returned the G5 iMac to me in pieces, saying, among other things, "...sorry...".
I took it to Sedona to the Mac Clinic for it's covered repair. That mechanic is great, but usually backed up by two or three weeks.
There is still the great Apple mechanic in Sedona but he is always backed up by about three weeks. So it was off to Scottsdale, probably a half hour longer trip than to the Phoenix store, and an hour longer than to Sedona, but perfectly easy parking because most of the stores in that mall are still under construction.
Ah, life in the big city.
Thanks for the note - probably more response than you needed. Oh, and I do plan to purchase Apple Care - wouldn't be caught with a dead computer without it. Mac's and Apple Care - probably the last good deal in town, though it's been my experience that it's not usually needed, other than the G5 all my Mac's (back to a B&W Mac Classic) are still running.

Hp pavilion g6 freezing with horizontal lines

Hi i have a Hp pavilion g6 running windows 7, was originally running windows 8. I have been having trouble with it freezing/locking up. I have tried bios updates, driver updates, the diagnostic tool for memory check and hard drive check, i have even used used scf /scannow. everything comes up as ok or passed. so i changed to windows 7 thinking it might make a difference, but to no avail. The flickers with these lines for a few seconds and i get a screen full and it either freezes there or a couple of seconds after. Nothing happens when i am in the bios or when I am running in safe mode. please someone help me i have run out of ideas. thanks

Hi:
All of the W7 x64 drivers from this related model will work on yours.
http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareIndex.jsp?lang=en&cc=us&prodNameId=5278312&...

Display freezes with horizontal lines, then turns dark

I've recorded a little video to explain my problem better :
http://www.youtube.com/watch?v=23Fs2T7Cjb8
Please don't mind my brother talking in the background and commenting in French about MotoGP umbrella girls
It all started like 6 months ago, from time to time there were horizontal lines visible in the lower-right corner of the display, that disappeared immediately after that I pushed the screen, then 3 weeks ago it started doing that...
My Macbook never fell down, I always transported it in a Be.ez LArobe bag which I believe is rather resistant.
The horizontal lines on the lower right are now permanent, and the freezes are more and more often.
I think there might be a contact problem, since the display gets back to normal when I push it.
Since it's been nearly 2 years that I own my MB and don't have AppleCare, I'd like to know if I can solve this problem without emptying my wallet by having to pay for a new display...
Thank you for your answers and sorry for my approximate English

Thank you for your answer, but actually I forgot to mention that I own a Nov. 2008 13" MacBook Unibody in aluminium (which is now called MacBook Pro, that's why I posted here rather than on the MacBook forum), and it only has one graphic card, thus I can't solve my problem this way.
Also I'd like to add that in my opinion, for what it's worth, this is not a software issue, since when I push on the screen as shown in the video, the artefacts disappear, and when I release the screen it starts again, so I believe it could just be a false contact.
I know that if it is a hardware problem I should go to an Apple Store or a Premium reseller but it would mean a 200km trip at least, and I don't have any backup computer, and I need it for my exams at the moment, so I can't really leave it for 2 weeks to be sent to Apple right now, nor can I afford for a new display if the problem is more important than I thought. I'd just like to know if this can be fixed quickly and without emptying my wallet, if that's not the case well I'll just wait and pray my MB survives through my exams
Thanks for your help

IMac suddenly freezes with Little green stripes! What's the problem?

Was working and suddenly had this problem: whole screen and additional monitor was covered with little signs - 3 little stripes. No reaction on mouse or keyboard. After cold reset same problem

I suspect a hardware problem. I'd recommend taking it to your local Apple Store or AASP. You can try to run Apple Hardware Test though in Extended Mode.

Horizontal green lines display issue

When I have the brightness up more than 4 or 5 notches and a white screen is up, for example Safari, it leaves green horizontal lines exactly where the brightest part of the browser was. They go away after a while, but I'm always afraid I'm messing up my display so I leave it pretty dim. I have the 27in imac from late 2013. Is it a faulty display or is this common?

Hi xlpacmanxl,
So the first thing that I would want to know is with the brightness cranked all the way up, do these lines appear during startup?
As for troubleshooting:
Install any and all OS X updates via the App store.
Perform a NVRAM reset:
About NVRAM and PRAM
If it is still going on reset the SMC:
Intel-based Macs: Resetting the System Management Controller (SMC)
If the issue still persists, we will need to know if it is occurring outside the OS. Boot to recovery by holding CMD + R during startup. There you can open a safari window by selecting Get Help Online. Crank up the brightness all the way and if you still see the lines there, head into an Apple Retail store for a diagnostic.
Thanks,
Ludeth

IMac Freezes with opening of Mail

My iMac has been working great for the past four years, but recently it has been freezing up a lot. The internet won't work, most notably Safari, but the other application, such as word, freeze as well. There are two emails in my mail account that will not delete and instead turn grey in the inbox. When I click to open the emails they show no message but just a sender address. One is from Macy's and one is from Finish Line. Do you think these could have anything to do with my iMac issues or is it something else?

Try repairing your hard drive with disk utility, also repair your permissions. If you are still have problem you need to check your CPU and your RAM usage in activity monitor. Also check your remaining hard drive space you should have at a minimum 10% or more.

Imac freezes with horizontal green lines

Similar Messages

Maybe you are looking for