Horizontal lines on external display

I have just received a refurbished mac mini (previous generation) purchased from Apple. When attached to my monitor, an LG Flatron L204WT, it displays thin horizontal lines which run the width of the display. They are present across the entire display. The lines are most noticeable on a solid grey colour. They are not visible in a gradient, such as the drop shadows around windows. They look similar to horizontal scan lines on a CRT television.
I use the same monitor as an external display for my macbook; it doesn't have this problem.
Has anyone else had this issue? I realize I can take it to Apple for repair, but I would hate to find out this is a chronic problem. Coupled with the annoying chirping noise the mini is making, this is a bit of a let down... I'm considering returning it. Anyone had wither of these issues with the redesigned mac mini?
Thanks!

Calibrated the monitor using "expert mode"... problem solved!

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Horizontal Lines Across MBP Display

I am getting horizontal lines across the display of my laptop. The lines do not show-up when I have the computer attached to the external cinema display, and the lines will go away if I run the disk utility, with the only errors being SUID errors that cannot be repaired, and Apple has said aren't an issue. However, the next time I open my laptop, the lines re-appear. I've reset the PRAM, and that didn't work. If the lines are showing, a rebooting of the system does not help. The only fix I've found is running disk utility, but that is a very temporary fix.
The lines are all over the screen rotating up from top to bottom, and multi-colored. The overall display is blurry.
Any ideas?
Thanks,
Will

Unfortunately, that makes it sound like a problem with the built in display. Have you tried running the extended version of the Apple Hardware test? If you get an error code, it might give you a clue.
Do you have access to an Apple Store? I think they have a special diagnostic for the NVIDIA chip problem, so they might be able to pin down for certain if the problem is with the chip or the display.
Good luck!

Macbook Pro w/Retina - Horizontal Lines on Entire Display

We have just issued some 15" MacBookPros with Retina Displays to users. They are running Yosemite. Users are complaining about very low contrast horizontal lines that run the entire width of the screen across all windows, including the background desktop image. They don't really impact usability much, but since we paid top dollar for the retina displays I expect better. Lines are there across all resolution settings.These are not glitches like others have reported.
Anybody seen this?
The users are also having random problems with the entire computer locking up when attaching or detaching an external 4K display but that's a different issue.

I'm having this as well.
I got an early 2014 15" Retina MacbookPro that has the exact same thing for the past 2 weeks.
It looks like there's a very faint, low-contrast white/grayish line every 2 pixels on the screen. It's visible everywhere indeed (also in OSX recovery).
I'm running 10.10 as well but I don't think it's actually an OS issue.

I get glitch lines on external display

Ive noticed on my last monitor and this new one too. On certain web pages or video oriented tasks. Lines show up on the screen. They flash in and out. what could this be...bad video card?
I thought going to a DVI display would help but I guess not.

I've come to a conclusion that when the video card overheats the lines come.
Reason being, I opened the lid and the lines were still there and when I tested a dvd movie on full screen the lines were there. And watching a DVD movie on my display never used to cause lines. But I don't watch many movies on my powerbook.
Before plugging in my new external display I noticed that my powerbook was set on Better Perfomance and never hit sleep mode the whole time I was at work so when I came home the Powerbook was pretty hot.
As time went on with the lid open the lines began disappearing. So I decided to keep it open and not run anything too crazy and as the Powerbook cooled the lines started disappearing.
I ran a full screen movie like a half hour later and received no lines!
And here I am this morning using my lcd for the past hour and a half on internet and again, no lines.
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Smart form footer issue in 2nd page - Horizontal line is not displayed

Dear Experts,
I am working on a smartform. Which has a table (Header, Main area, Footer), When there are more records and footer alone is printed in the 2nd page, i am not getting the first horizontal line for the footer and it does not look like a table in second page.
My smartform table exactly looks like this when printed in a single page.
|_________|______________|_________________|____________|________________|__________| - Header
|_________|______________|_________________|____________|________________|__________| - Main Area
|_______________________________________________________|___________________________| - Footer
When the footer alone is printed in second page, i want to print as
|_____________________________________________________|__________________________| - Footer
But its printed as
|_____________________________________________________|__________________________| - Footer
When the item records are printed in multiple pages, i will have header and item records in every page. The problem comes only when the footer alone gets printed in separate page.
Please suggest me how to fix this issue. Thanks in advance.
Rajesh.

hi rajesh..
check the line type for that footer. It's getting displayed properly on multiple pages because the lower line of other rows is getting overlapped on the upper one of footer. This is why you dont recognize it.
On single page there arent any other rows. So it shows a blank.
So as samreen said make the top line of that line type bold.
Regards,
Sumit.
Edited by: Sumit Nene on Aug 28, 2009 7:02 AM

Nasty horizontal line appeared on display

My MBA has suddenyl developed a nasty horizontal line right across the display. Looks about a pixel in thickness.
Any thoughts please?

Took it into a Genius and they're replacing the screen for free. No quibbles at all. And its 2 years old. And its not in warranty! And I get the loose hinge issue solved at the same time!
Happy bloke...

Horizontal lines on imac display, video card going bad?

I have horizontal lines and a triangular shaped artifact on my 24 inch Imac display. This happens after quite awhile of use, so I am thinking it might be the video card is about to go. Also, have issues with viewing flash videos, the browser (safari) will just quit responding, sometimes it will recover. Most times I have to reboot the machine. I believe all these syptoms are related. Any ideas?

Welcome to the Apple Support Communities
Your graphic card is damaged. Unfortunately, the only thing you can do is to take the Mac to an Apple Store or reseller to get the computer repaired.
Both problems may be related, because Flash uses the graphic card and it often fails

Horizontal lines on macbook display

i have recently seens several horizontal lines on my macbook display.Started with one and now several of increasing size

Run AHT
http://support.apple.com/kb/PH11342
If it doesn't effect your other computing, only the display, it may be a bad graphics card.
You can try a PRAM reset
EDIT Wghat year is your MB and do you have AppleCare or Extended AppleCare?

Anyone had horizontal lines on iMac display.

Does anyone know why I have horizontal lines showing up on my imac. The genius support at the apple store told me it was the display and would cost $400 to fix. I have owned it 3 years and 1 month.

I have the same problems, and did some googling. I found out the white 24 inch (late 2006 to early 2007) Imacs have a video card problem. The soldering on these units tend to go bad, the card is the Nvidia GeForce 7300 GT.
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Horizontal lines comes in display

I am using compaq presario f700 laptop it has a problem when i turn on it starts normally its work properly but after a few minutes on display horizontal lines covers up all. when laptos get warmed up this kinds of problem accure after a computer get cool and turn it on display shows normal view and again same problem accure please help me what is going on with my laptop

Hello swarnika,
To get your issue more exposure I would suggest posting it in the commercial forums since the Compaq Presario F700 is a commercial product. You can do this at Notebook - HP ProBook, EliteBook, Compaq, Slate/Tablet PC, Armada, LTE
The support page for your product may be helpful in the meantime: Compaq Presario F700 Notebook PC series.
I hope this helps!
Thank you for posting on the HP Forums.
Please click the "Kudos, Thumbs Up" at the bottom of this post if you want to say "Thanks" for helping!
Please click "Accept as Solution" if you feel my post solved your issue, it will help others find the solution.
The Great Deku Tree
I work on behalf of HP.

Horizontal line on Macbook display

Hello everyone!
I'm writing regarding my brother´s Macbook. The computer is about 1 month old now. He's been very satisfied with his first mac until now. A couple of days ago when his computer woke up from sleep it had this horizontal line (1px high) crossing the screen. It sometimes changes color, but it won't go away. I tried resetting the NVRAM but it didn't help. Does anyone know something that might solve the problem?
//Jonas

Welcome to macbook forum,..
It could be a "slow" pixel rather than a dead pixel.
If that line is crossing your screen, I think it accumulate more than 15 or 20 bad pixel that required to make it eligible to be covered by warranty (double check this with apple or authorized service center).
also try this too:
http://www.apple.com/downloads/dashboard/status/pixelfix.html
Good Luck.

My iPad 1 is getting faded horizontal lines on the display. How can I get rid of them?

How do I, or can I get rid of these yellow lines?

Hi Laura’s,
I see that you are experiencing an issue with the display on your iOS device. Here is an article for you that will help you troubleshoot this issue:
Get help with the screen on your iPhone, iPad, or iPod touch - Apple Support
http://support.apple.com/en-us/HT203039
Thanks for being a part of the Apple Support Communities!
Cheers,
Braden

In graph at the a particular value (threshold value) in Y-axis horizontal line have to display like a alert for the user. How to achieve this? (In WebI)

How to achieve this in WebI?

Just create a measure for it. Here's an example in E-Fashion:
This is Sales Revenue for 2006; all I've done is added a new measure called "Target", which is just:
=900000
The chart is a combined chart. The Z Axis scale wasn't the same as the Y so I manually changed it to hard coded minimum and maximum values - you get the idea.
HTH
NMG

HT4425 horizontal line display macbook air 11.1 2010 late

Have a good day.
i have a macbook air 11.1 intel core 2 duo 2010 late, right now i am wacthing a horizontal line in the display, i have snow leopard system.
anyone know what kind of action can i do.
thanks.

Probably the best thing to do is take it to an Apple Store or AASP for service. You can try running Apple Hardware Test in Extended mode however I think any errors will require service. You may need to run AHT 3 or more times for it to find errors.

PowerBook Will Not Wake from Sleep - Horizontal Lines on Display

I have a new PowerBook that I purchased last December. When my computer goes into sleep mode, it will not wake up unless I do a hard poweroff by holding in the power key for 5 seconds. When it tries to wake from sleep all I see is my mouse cursor on a black screen or the spinning beach ball. I'm also having problems with graphic applications such as Photoshop or Adobe Illustrator where I'm using lines that are only 1 pixel in length. The lines disappear when I drag them across the screen as though I'm missing a whole row of pixels or half of the line is fainter. I also notice very fine horizontal lines throughout my display. My older PowerBook does not have these lines nor this wake from sleep problem.

Contact tech support, it will need to be sent in for repair, and as long as your hardware warranty is good or you have APP the repair will cost nothing. unfortunatly this is basically your only option, unless resetting NVRAM takes care of it. to do that turn off com. hold down option, apple(2 key's left of space bar)and o, f, then turn on while holding those down. when firmware opens up type in reset-nvram, press enter then type in reset-all(include the dash in both)
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Horizontal lines on external display

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