My iMac starts up with vertical stripes on the screen

My iMac starts up with vertical stripes on the screen, does anyone know what it could be?

My issue is Blue Strips on start up and its frozen at Grey screen forever > I only successfully log-in on SafeBoot mode only actually while I'm typing this
been looking for solutions until came through your posted , ITS HELP! :-) Thanks to you!
so turn out mine was the LCD or Cable like you said,
What should i do from now ? already been tried many solutions :
Clean installed , PRAM , AHT ,
iMac (27-inch, Late 2009)
OS X Yosemite (10.10.2)
Please, Any suggestion ?

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My macbook pro keeps freezing with vertical lines on the screen

I have a 2010 macbook pro that has worked wonderfully until now. As of late it keeps freezing with vertical lines across the screen. To me this indicates a hardware problem, but I ran a diagnostic (restarted while holding D) and it didn't find any errors. It seems that it happens when I move or bump my macbook, leading me to think it may possibly be a disk problem, but I'm not sure how to check this. Anybody else ever have this problem or could suggest a fix for it?

You can try a pram reset, which might help with the display, but the bumoing thing is what concerns me.
PRAM reset:
Power down, power back up and hold the following keys before the start up chime.
option, command, P, R,(no commas) continue to hold these keys till you hear the start up chime 2 times then release.
Reboot see if this helps, the bumping part scares me.
Hope this helps

I-Mac crash with vertical lines down the screen

My i-Mac is about 4 years old, running OS-X version 10.8.2.
About 2 weeks ago my system suddenly crashed and the whole screen was filled with vertical lines - alternate blue and white.
Yesterday the same thing happened, except that the vertical lines were alternate red and white.
Both times I turned the desktop off, left it for a minute or two, and then turned it back on again. The system then booted up normally and I was able to access all my applications as normal.
To date my i-Mac has been very reliable but I am a bit worried that this 'crash' problem has now occurred twice. I have kept the operating system up-to-date and am running OS-X 10.8.2.
Could anyone please tell me why this problem is occuring and how I can fix it?
Thanks in anticipation.

Thanks for your help.
I have a 24" i-Mac (bought new in 2009), do your comments still apply?'
What do you think could have caused the card to develop this fault? (Currently only internmittent, but it presumably will get worse)?
I will back up my files and go and see my local Apple Store as you suggested, but do you have any idea how much replacing the graphics card on my 24" machine would cost??

4 vertical stripes on the screen of my Qosmio G-series!! ?

Hey.
I have gotten 4 vertical lines on my laptop screen. 2 pink and 2 green. They have appeared either when I turned on my machine or rebooted. Got my first line last month. Can I do anything with this issue? The machine is 3 years old.
Regards Stian.
Picture of my screen.
[http://i288.photobucket.com/albums/ll162/bruteforce82/1.jpg]
Edited by: Admin on 12-Apr-2008 09:17

Hi friend,
thats definitively an hardware failure. The question is:
Is it the display, the display cable or the mainboard.
You know that you will have to pay for it, but its up to you if you would like to spend some money for it or just selling it on Ebay and getting another machine.
If I were you I would contact some repair shop or service center and ask them for a hardware checkup, so you can localize the malfunctioning part.
Greets
P.S.: If you need a link to the nearest avail. authorized service center then click [HERE|http://eu.computers.toshiba-europe.com/cgi-bin/ToshibaCSG/download_whitepaper.jsp?service=EU&WHITEPAPER_ID=0 000000871].
Greets and good luck

Intel iMac (Early 2008) Has vertical lines on the screen and doesn't boot.

My iMac froze up tonight, and upon restarting it there are a number of yellow vertical line segments throughout the display, and it will not boot completely into the OS. The spinning segment just stops and the computer does nothing. I inserted my Leopard disc to run a hardware test but holding D during bootup does nothing, even though I can hear the disc spin up.
http://img651.imageshack.us/img651/1843/img1821uf.jpg
http://img707.imageshack.us/img707/1651/img1823s.jpg
Any Thoughts?

I've had this same exact issue and have had to have the graphics card replace (nvidia 8800gs).
It seems these graphics cards are defective in some way.
Unfortunately my iMac is out of warranty and I must pay 3500dkk ( 500usd ) for repair.
I'm very disappointed as to the reliability of these iMacs as I've only had it for 2 years my old iMac g4 1ghz has performed better than this and is actually what I'm using until my so called new iMac is back from repairs

Satellite P100-286 - Vertical lines on the screen and constant reboots

I got this P100-286 with Nvidia Geforce Go 7900 GS and recently the laptop started freezing with vertical lines on the screen tried different options even tried recovery cd to re-install and after installation it started doing the same. I have read similar problems in the forum and is this a common problem with Toshiba? I have spend 1500 on this and it is only 3 years old. My friends have laptops older than this almost 6 years and in good working condition.
Is there any solution or suggestion for this problem? The heat on the base of the laptop is really hot and it is like this for ages.
Any help is really appreciated after spending this much would like to last longer or it is a realibility issue with Toshiba brand.

It is happening in BIOS and even tried ubuntu on a boot cd and still having the same problem. I took to a PC servicing center they immediatly said it is a graphics card problem. The lines are comming in an external display as well. If you search in this forum you will see similar issues is reported by another user. I do think it is a genuine problem. The graphics chip is on board and it cost a lot to replace it that is what I been told.
some link pointing to this type of issues
http://forums.computers.toshiba-europe.com/forums/thread.jspa?threadID=42897
http://forums.toshiba.com/t5/Drivers-and-Utilities/Satellite-P100-screen-driver-issues/td-p/94671
or in google search for "toshiba p100 video freezing"

Imac screen grey with vertical stripes

hi,
i have an imac 24' late 2009 silver, and sometimes the screen suddenly "switches off" and shows a grey screen with thin vertical lines about 1cm apart. this happened twice this month now, usually when the mac was switched on for a few hours. What can it be ? is the screen broken ? Should i reinstall everything ?

You should run some diagnostics to see if you have a hardware issue first. Where I'd start is running Apple Hardware Test in Extended Mode. It isn't the best test available for testing hardware however it does uncover some problems. If you get an error code you can post it here or Google it to get a clue what it means.
You can also do some basics such as restarting in Safe Mode and doing a SMC and PRAM reset however I don't think those will help from the way you are describing the problem. Resetting both the SMC and PRAM is simple though and it can't hurt.
SMC RESET
Shut down the computer.
Unplug the computer's power cord and all peripherals.
Press and hold the power button for 5 seconds.
Release the power button.
Attach the computers power cable.
Press the power button to turn on the computer.
PRAM RESET
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.
Roger

Qosmio F30 starts with blue stripes during the start screen of Vista

My Qosmio F30-114 runs since years without Problems with Vista Ultimate.
Since some Days there is a huge Problem.
The Qosmio starts with blue stripes during the start screen of vista.
So I deleted the driver of the graphic card and used the standard vga card driver. the hardware assistent found a driver on the system.
For a short moment i was very lucky.
After a restart, there was a blue screen. after the next restard, again the standard vga card driver.
What can i do?
The download section of toshiba has no drivers for graphic card.
And really ... i wonder - how does it works all the years without problems...
Has anyone a solution?
thanx
toshibalover ;-)

Hi!
First of all do you have this issue on an external monitor too or only on the internal monitor? Maybe its not a problem of the graphic card so check this with an external monitor.
I have checked the Toshiba website and there I can find some drivers for the Qosmio F30:
http://eu.computers.toshiba-europe.com => Support & Downloads => Download Drivers
Bye

My imac starts up with a white screen, gray apple and spinning gear and is frozen on that screen. What can I do?

my imac starts up with a white screen, gray apple and spinning gear and is frozen on that screen. What can I do?

Start your iMac with the original DVD that camera with the system. Then open disk utility and repair your hard drive, also repair your permissions.

Sometimes my iMac starts with white lettering across the screen on a black ground and after switching off for a few seconds starts on ok ! Any ideas

Sometimes my iMac starts up with white lettering acrossthe screen on a black background - when it's switched off for a few seconds it starts up ok. Can anyone tell me why this happens ?

I have read on here that a PRAM reset can cure this problem:
Shut down your Mac.
Locate the following keys on the keyboard: Command (⌘), Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

I have 4 vertical stripes across the entire height of my monitor. Do I have to buy a new imac? e

I have 4 vertical stripes across the entire height of my monitor, the stripes are there even before I log on. My 17" imac is 6 years old. Do I have to buy a new computer?

Frequent problem on 2006 17" imac!
Most of the time, it's a defective LCD panel.
To validate if it is the LCD panel or the graphic card, you can take a screen shot (cmd+Shift+3) and see if the problem is visible on the screen shot.
If it is not visible, then it's most likely the LCD panel.
This can be confirmed by connecting an external display to your iMac.
If it works well, then it's the LCD panel that is defective.
Does it look like this?

I have a IMac - Mac OSX version 10.4 and présently i see only verticals lines on my dashboard and my mouse still mouving but with a little square with vertical lines at the right. This appen when i was talking with a friend on Skype. I need help to unlook

I have a IMac - Mac OSX version 10.4 and présently i see only verticals lines on my desktop and my mouse, i mean the arrow and still mouving but with a little square with vertical lines at the right. This appened when i was talking with a friend on Skype, by error i did click on the video and slowly the vertical lines appeared and covered all ma desktop. Since then, it still there and the only things i see it is the vertical lines and the arrow with the little square.
How can i fix this problem ?
En français: j'ai un IMac - Mac OSX version 10.4 et présentement je vois seulement des lignes verticales sur mon bureau et ma souris c'est-à-dire la flèche, bouge mais il y a un petit carré avec aussi des lignes verticales à sa droite. Je pense que ce bug est survenu lorsque j'étais sur Skype avec une amie et que par erreur j'ai cliqué sur l'image de la vidéo et peu à peu les lignes sont appurues et tout l'écran est envahie par ces lignes.
Comment corriger le problème ? Merci à l'avance.
Réjeanne Blouin

Hello, sounds like Video card and/or heat problems.
Have you blown the dust out lately? Let it cool for an hour or so.
Get Temperature Monitor to see if it's heat related...
http://www.macupdate.com/info.php/id/12381/temperature-monitor
iStat Menus...
http://bjango.com/mac/istatmenus/
And/or iStat Pro...
http://www.islayer.com/apps/istatpro/
One way to test is to Safe Boot from the HD, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, Test for problem in Safe Mode...
PS. Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive
Reboot, test again.
If it only does it in Regular Boot, then it could be some hardware problem like Video card, (Quartz is turned off in Safe Mode).

How can I start anew with Photos and clear the (minimal) stuff it has uploaded

I've about had it up to here with this new Photos scheme. I reorganised my Aperture libraries on both my iMac and MBA in preparation for this, delayed turning Photos on for a couple of days until I thought everything was ready based upon the limited advice that was out there, and then got stuck in an endless loop of "uploading" and "preparing" every time I opened Photos. There are 19,975 images in my Aperture library on the iMac. I was stuck at Uploading at anywhere between that number and 19,000 with no progress after hours of waiting. I tried all the tricks mentioned here including re booting, restarting the app, repairing/rebuilding the database, killing the "cloudd" process, etc.today Today when I restarted Photos, it now said I had 23,775 images to upload- 4000
more than I have-and of course it got stuck there, like it has for the last week.
I copied the previous Aperture library (pre Photos migration)back to my iMac and opened it in Aperture. Thankfully, all the photos I had taken on my iPhone this week during this Photos clusterphuck transition were in the Aperture Stream so I didn't lose any of those. I'm willing to give this whole thing one more shot. So i need some advice. How can I start anew with Photos and clear the (minimal) stuff it has uploaded (about 6000 of 19,000 images in the last 7 days) ? If I simply delete the Photos.photolibrary file will that do the trick and lt me start a new fresh library using?
<Re-Titled By Host>

How can I start anew with Photos and clear the (minimal) stuff it has uploaded (about 6000 of 19,000 images in the last 7 days) ? If I simply delete the Photos.photolibrary file will that do the trick and lt me start a new fresh library using?
It is hard to say from your post, why the migration did not succeed in your case.
by "stuck on upload" do you mean, you opened the Aperture library in Photos, and Photos converted it to a Photo Library, and then the upload to iCloud Photo Library did hang? Or did already the upgrade to the Photo Library fail?
If you want the Aperture library to upload to iCloud Photo Library, it needs to be on a disk formatted MacOS Extended (Journaled) and the original image files must not be referenced. Referenced originals will not upload.
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To start over, try to repair and rebuild the Aperture library before opening it in Photos. Try all Aperture Library First Aid options - starting with repairing the permissions. (Repairing and Rebuilding Your Aperture Library: Aperture 3 User Manual)
If I simply delete the Photos.photolibrary file will that do the trick and lt me start a new fresh library using?
You will have to delete the photos that are already in icloud too; otherwise you are risking duplicates.
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Flashing vertical stripe in the middle of my 27" TB display

I am getting a flashing vertical stripe in the middle of my 27" TB display, its a very random flash, can anyone help its driving me insane

Hi PUSH,
If you are having intermittant issues with your Thunderbolt display, you may find the following article helpful:
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/ht1573
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My iMac 27" is 2 years old. The screen just start to sleep every 2-3 minutes and then one has to reboot it. I bought the unit from Incredible Connections in South Africa. They sent it to the South African distributors Core. They report LCD screen defect?

My iMac 27" is 2 years old. The screen just start to sleep every 2-3 minutes and then one has to reboot it. I bought the unit from Incredible Connections in South Africa. They sent it to the South African distributors Core. They report LCD screen defect and charged me R7500-00 to replace the screen and sent it back after 4 weeks.
It does not go to sleep anymore; but when switch on; there appears a flickering band of lines on the screen which last for about 20 seconds before the machines starts to work normally.
It seems there is still a screen problem!
We had to send it back again.
The other problem is that you just get no communication out of the Core workshop and you cannot communicate with the technician.
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Sounds like the graphics card might be the problem. Run the Hardware Test in extended mode. If you get an error it can be trusted, but getting a negative may not be all that meaningful. Bring it back to them and let them check out the machine again.
http://support.apple.com/kb/ht1509

My iMac starts up with vertical stripes on the screen

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