IMac horizontal lines through screen?

My Late 2009 21.5" iMac seems to be having some sort of graphics problem... when using iMovie/ iDVD for long periods of time, the whole system will freeze and have multi-colored horizontal and diagonal lines through the screen... any one else having this problem??

Hi georgenjr,
It sounds as if you are having issues with the display on your iMac running the server software. I would suggest that you troubleshoot using the steps in this article -
Apple computers: Troubleshooting issues with video on internal or external displays
Thanks for using Apple Support Communities.
Best,
Brett L

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http://www.daniweb.com/techtalkforums/post24947-5.html
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Stay tuned for the happy ending next week. Until then I am running with
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Message was edited by: aRKay

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Hp 2711x Monitor horizontal line across screen

Monitor HP 2711x has a horizontal line about 2/3 the way down, completely across the screen about 1 pixel wide. The line looks like a slice trough the current screen image to some kind of image behind the current open windows, but there is no such image behind. Adjusting the screen resolution turns the screen black monentarily which sets the line's color to black when the screen reappears, but then the line changes to again look like a slice through the current window to some kind of false window behind. Rotating the screen image does not rotate the line. Adjusting the screen reolution does not alter the line. Resetting the monitor to factory default does not alter the line. Changing the PC providing input to the screen does not change the line.
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DaiP, welcome to the forum.
Here is the Display Quality issues section for the monitor. There are some issues that don't apply. Try the ones that do to see if they help.
Please click "KUDOS" if I have helped you and click "Accept as Solution" if your problem is solved.
Signature:
HP TouchPad - 1.2 GHz; 1 GB memory; 32 GB storage; WebOS/CyanogenMod 11(Kit Kat)
HP 10 Plus; Android-Kit Kat; 1.0 GHz Allwinner A31 ARM Cortex A7 Quad Core Processor ; 2GB RAM Memory Long: 2 GB DDR3L SDRAM (1600MHz); 16GB disable eMMC 16GB v4.51
HP Omen; i7-4710QH; 8 GB memory; 256 GB San Disk SSD; Win 8.1
HP Photosmart 7520 AIO
++++++++++++++++++
**Click the Thumbs Up+ to say 'Thanks' and the 'Accept as Solution' if I have solved your problem.**
Intelligence is God given; Wisdom is the sum of our mistakes!
I am not an HP employee.

Dropped my phone. Black lines through screen. Fixable?

I'm a very clumsy person. I've dropped my phone multiple times, & it's never sustained any damage. Unfortunately, last week I dropped it screen-down. The phone is still functioning normally. The only problem is that black horizontal lines have appeared near the top of the screen. They started off at probably about half an inch in length, now the lines have spread across the width of the screen. I'm assuming that dropping my phone has caused damage to the touch screen.
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You should be able to do an early upgrade if you explain whats going on, maybe
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Macbook Air 11-inch, Mid 2012 Processor 1.7 GHz Intel Core i5 Memory 4 GB 1600 MHz DDR3Graphics Intel HD Graphics 4000 1024 MBSoftware OS X 10.9.2 (13C64)
Link in case the image doesn't appear http://imgur.com/eyWz9mL
[IMG]http://i.imgur.com/eyWz9mL.jpg?1[/IMG]

CelticsBird wrote:
Thanks, I did reinstall OSX and it seems to have solved this issue. Everyting that was occuring this week now is corrected. Thanks
Yes, that had to be it, GPU wouldnt cause that.
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I hate to spread gloom, but that computer has serious problems. The only people who can diagnose the problem(s) are technicians. I would take it back to the Apple store for further testing.
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Hi to all,
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Soni:
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cornelius

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Hi all,
I received a new PC today and when I set it up, there appears to be problems with the graphics card - there's a series of horizontal lines on the screen. Photos probably explain it better:
http://imgur.com/a/o7MfN
The system is running 2x MSI GeForce GTX 560Ti Twin Frozr II in SLI
The computer also can't seem to recognise it has a 560ti installed at all - it was using a generic VGA adapter driver on first startup - just in case, I downloaded the latest software from NVIDIA, and they do not recognise the display being attached to an NVIDIA card.
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i5-2500K Processor
2x MSI GeForce GTX 560Ti Twin Frozr II OC 1024MB GDDR5 Graphics Cards in SLI
8GB Mushkin (2x4GB) DDR3 1600MHz 9-9-9-24 Blackline
64GB Kingston SSDNow V100 2.5" SATA-II SSD
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Corsair TX 750W ATX2.2 SLI Compliant Power Supply
Samsung Blu-Ray SH-B123L/RSBP
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Quote from: saram1805 on 03-March-11, 14:29:38
I've tried both ports on the card and the same issue is there.
Do you mean test both cards?
I get no output from the 2nd card at all when they're in SLI. I also can't get into the nvidia control panel to turn off SLI as the software doesn't recognise the GPU being an nvidia card. I've tried physically disabling SLI (I removed the SLI bridge) but I still get no output from the 2nd card.
Is this normal? Or is there something else I have to do to test the other card?
Quote
Do you mean test both cards?
I mean what i've told you:
Quote from: Svet on 03-March-11, 13:51:09
do test each one VGA alone to isolate the issue.
E.g. take out the second VGA from your computer and leave just 1 installed.
Then see if the problem persist or not.
Then take it out and replace it with the second VGA into the same PCI-E slot[use the 1st one close to the CPU socket]
Then retest when using the second VGA alone.

Black screen on startup; horizontal lines on screen precede crash

A few days ago my Mac Book Pro screen freaked out. Specifically, it had multicolored horizontal lines all over, but underneath I could see a dark grey dialogue box telling my to restart the computer.
Now, about two thirds of the time, when I try to start up the screen stays black and it does not make any startup noises but the power light comes on steady. One time this was accompanied by a beeping tone that beeped in sets of three. The other one third of the time it starts up fine.
Once it shut itself down after the horizontal lines appeared again.
Once it has frozen while on the screensaver and I had to manually shut it down.
Any idea what might be causing this? My computer is still under warrantee but I live over an hour and a half from the nearest apple store.

Welcome to Apple Discussions!
If you have the NVIDIA GeForce 8600M GT video chip, you might be developing this problem:
http://support.apple.com/kb/TS2377
The beeps and kernel panic do seem to point to a RAM problem. If you replaced the original Apple RAM with 3rd party RAM, try the Apple RAM if you still have it and see if this cures the problem. Otherwise, try reseating it as described earlier.
Here is an article that may be of help:
http://www.thexlab.com/faqs/kernelpanics.html
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Good luck!

Horizontal lines on screen

Hello, when I start up in Safe Mode and only in Safe Mode in my iMac (mid 2011- HD 6970M 2048 MB) appears white horizontal lines.Not a big problem but I worry if something starts here. I changed already the graphic card almost before a year.
Any ideas ?

GPap1981 wrote:
So I have to go on the Apple Shop again and install a new card for 2nd time.
Any possibility the problem is the motherboard ?
I have no idea, but the Apple Store will.

IMac horizontal lines through screen?

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