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...

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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!

Horizontal lines appear in various programs on macbook pro that gets very hot.

Model Name:
MacBook Pro
Model Identifier:
MacBookPro1,2
Processor Name:
Intel Core Duo
Processor Speed:
2.16 GHz
Number Of Processors:
1
Total Number Of Cores:
2
L2 Cache:
2 MB
Memory:
2 GB
Bus Speed:
667 MHz
Boot ROM Version:
MBP12.0061.B03
SMC Version (system):
1.5f10
Serial Number (system):
W86241X4TJ1
Hardware UUID:
00000000-0000-1000-8000-0016CB902C12
Sudden Motion Sensor:
State:
Enabled
thin horizontal lines appear occasionally across window of firefox, if i switch to finder, not there. appears to stay with windows of different programs.
lately above the keyboard along back edge in the middle under monitor gets very hot almost to hot to touch, uncomfortable on lap.
i have no idea what the memory cards are. some have suggested i should replace memory cards?

I don't really know about the new models as far as typical operating temperatures. The ones you mention are not meaningfully high to me. My 2011 13" MBP with an i5 CPU typically idles near 50º C.
As for the speed issue that is hard to evaluate on the basis of personal opinion. You can download and run GeekBench benchmarks and compare the results to those reported for the same model configuration. You can use CineBench to benchmark video performance.

A red horizontal line appear on my imac

2 days ago after i oke up, a red horizontal line appear at my iMac....try resetting still red line appear....any idead to to remove this?

Contact Apple Service, iMac Service or Apple's Express Lane. Do note that if you have AppleCare's protection plan and you're within 50 miles (80 KM) of an Apple repair station, you're eligible for onsite repair since yours is a desktop machine.

IPhoto '11: Horizontal lines appear across photo printed on card stock; don't appear on drafts printed on paper. How to get rid of them?

iPhoto '11: Horizontal lines appear on photo printed on card stock; don't appear on photos printed on paper or other card stock. How to get rid of them?

Horizontal lines appear on photo printed on card stock; don't appear on photos printed on paper or other card stock.
What's the difference between the first card stock and the other card stock? What's the finish on the problem card stock? What printer are you using? Does is have a physical adjustment for different stock thicknesses?

I have the new ipad and when I stretch the screen a horizontal line appears when I scroll whatever page or location I am on. The line is not there if the screen is minimised. Any solutions?

I have the new ipad and when I stretch the screen a horizontal line appears when I scroll whatever page or location I am on. The line is not there if the screen is minimised. Any solutions?

I can't personally as I never really liked nor used the picture frame feature in iPad. Just search in the App Store and read customer reviews and you'll likely find something you'll like.

Red horizontal lines appearing all over the screen accompanied with beeping

Today I had the weirdest of issues on my Macbook Pro (early-2011 13 inch core i5 hd 3000), while using Chrome, suddenly red horizontal lines appeared all over the screen with beeping sounds coming from the computer. I had to hard reset my macbook to make them go away. BTW I am on ML 10.8.2 and this is the second time I have had an issue after installing the updates, Digital Camera RAW update 4.04 and Airport utilitly 6.02. I have also installed the SMC update that was released earlier this month. A couple of days ago my macbook got stuck while shutting down and I had to close it manually and today this happened. Please tell me that this is not a hardware related issue because my warranty has expired

I ran the extended test and thankfully "No trouble was found" . Should I now report this to Apple Support, maybe there is a problem with the updates I have installed?
Here is the result of that test (the image uploading thingy inverted this image):

Horizontal line appearing on the Mac Book Pro 13" Retina Display

I RECENTLY BOUGHT A 13"RETINA DISPLAY MACBOOK PRO. IT IS SO DISAPPOINTING. THERE IS A HORIZONTAL LINE THAT APPEARS ON THE SCREEN AND DISAPPEARS. THIS WAS FOR THE THIRD TIME I HAD TO FACE THE SAME ISSUE. WHEN I EXPLAIN TO THE STAFF AT THE APPLE STORE THEY SAY THAT THEY HAVE NOT COME ACROSS SUCH ISSUE, FOR WHICH I SHOWED A PROOF FROM THE OTHER PART OF THE WORLD. VERY DISAPPOINTED.APOLOGIES TO WRITE IN THE UPPER CASE.BUT IT IS FRUSTRATING WHEN YOU HAVE A LOT OF EXPECTATIONS FROM APPLE LAPTOPS.

Thanks. But What at the most they can do. They are going to tell me to take the laptop to the apple store.

Horizontal Lines appear in random spots on display

Hey everyone.
Recently, my white iMac has been locking up a lot lately (forcing me to hard-reset, boo) and horizontal lines have been appearing. It freezes most often during more graphically-intense applications like games and Pro Tools. It's not the regular Mac freeze, where the grey dialogue box politely and multi-ligual-ly informs you that you need to reset. When my computer freezes, things just lock up, or the screen will go black.
I thought since I had not done a whole lot of computer maintenance since I bought it, there was a possibility it was just a horrible software glitch.
So I zero'd my hard drive and reformatted. Almost immediately the lines returned. Interestingly enough, I don't need a digital camera because these awful lines can get captured by screenshots.
The lines are typically pinkish or black, but if you look close, the individual pixels in the lines seem to be coloured arbitrarily. If the lines appear on a window, I can drag it around and the lines will follow. If I resize the window, the lines disappear.
Here's a screenshot. Note how the lines only affect the one window, and do not span the entire screen.
http://img161.imagevenue.com/img.php?image=29918lines_122708lo.jpg
These lines aren't bound to a particular window, just the desktop as a whole.
http://img142.imagevenue.com/img.php?image=45631lines2_1221119lo.jpg
How are these things getting captured on screenshot if I just reformatted my computer?
If it's not a software error, could a worn-out graphics card produce odd artifacts that are screen-capture-able? Apple ships hardware that can't last 2 years? Am I going to get shafted if I try to call them? Is there possibly a fix for this?
Thank you everyone for taking the time to read my post, and thanks in advance if you have some advice or want to express that you share the same issues.

Just to add a few comments to this thread, I had similar problems (green dots appearing at random locations on the display, lines, then corrupted icons graphics / text, and eventually computer lock-ups that required a power/hard reset).
It took me weeks to realize that heat was the root cause of these display artifacts / computer lock-ups. I had run zillions of memory tests, ran the Apple Diagnostic so many times, tried TechTool Pro, and I never ever got reported with a single error by any of these tools. I swapped RAM, disconnected all external Firewire / USB devices, tried different versions of Tiger / Leopard, to eventually conclude it had to be something else...
... and then it struck me one evening this week. I realized that I was now using my Mac Mini to transcode video (a task that I used to perform with my iMac, but that I stopped to use as a transcoding device as this would eventually lead to the symptoms described above), and that the Mac Mini's fan would increase in speed when the CPU would get loaded. It is then that I realized that I had never heard my iMac's fan change in pitch... with the exception of when I was running the Apple Diagnostic tool !!!
Gotcha !
I also downloaded the latest version of smcFanControl, and changing the fan settings to 1200 (ODD), 2200 (HDD), 2000 (CPU) fixed all the symptoms.
I submitted a bug report to Apple about this, as I consider this is a major issue. I have seen the temperature of the power supply reach 80+ Celsius. Water boils at 100 Celsius. That is hot, way too hot.
I hope Apple will fix this issue ASAP through a SMC firmware update as fans control is meant to be automated.
Just my 0.02$CAD.

Problem w/lines appearing on displays

Need a little help. Basically all the sudden these slanted vertical lines stating appearing all over my dual display setup. They go away if I move a window pane over them or try to grab them with the mouse. Even sometimes when I do drag a window pane the lines appear worse, and the graphics that makeup a window pane become jagged. If I click around the messed up graphics it gets fixed. Is this a video card problem? The fan is working on my graphics card. I don't think it's the displays, more of a software related issue it seems. But wanted to check 1st.
10.4.11
Dual 1.25 PowerPC G4
2GB RAM
Nvidea Geforce4 Ti
17" Apple cinema displays
Message was edited by: Robert Gutierrez1

The US Military has developed a very sophisticated model of failures of electronic equipment. But if you are not using just-invented products and launching them into space, the main factors that dominate predicted failure rates are:
• Number of transistors
• chip junction temperature
Display cards have huge numbers of transistors due to the complexity of their processors and the enormous amount of fast memory. They also run fast, which means they run HOT. They would be predicted to fail very frequently.
Yet posters here very seldom post problems that are resolved with, "looks like a bad display card". To me this says either:
• They don't fail as often as we expect. \[In which case, kudos to the card designers for robust designs and good cooling!]
• When they fail, the problem is so obvious that the complaints never make it to postings here -- they are replaced without any need for additional debugging.

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

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.

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!

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?

Nasty horizontal line appeared on display

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