Random black lines

i did an upgrade to leopard and i've been having some strange screen issues on my 24". there will be random black horizontal lines across the application i'm running, it has happened with most apps and sometimes i'd get all kinds of crazy lines around a dialog box, i donn know how to describe it, but the lines will move with my apps. for example, if i waz browsing the net a couple of hair thin lines would appear in the browswer, if i move the window, the lines will move with it; sometimes if i move the line out of sight off screen, the line(s) will go away temporarily, this also goes true with the lines that appear around dialog boxes.
i thought it waz an updrade problem so i backed my files onto an external and wiped the the mac clean and did a clean install of leopard to see if that would fix the problem, but sadly the problem persists even after a clean install.
anyone else having this issue? or is it just a coincidence that my old 24" imac display or gpu is wanting to crap out the same time i try to put leopard on it?
i've searched for "black lines" and "display issues" but all i get are blue-screen topics, which btw i have not experienced.

Weird as it sounds, you might wanna try taking out your video card, and blowing the dust off it with a can of compressed air, especially if you have a video card with a fan built into it, and air intakes.
I had a problem that sounds like this that kept getting worse and worse, until my computer started locking up all the time. Turns out that the problem was entirely due to my video card overheating.
The problem got much worse under Leopard due to the extra work it requires of the video card. Once I cleaned it, the computer has been running fine.
Here's my original post with pictures. If your problem looks like the pics I took, you might wanna try cleaning your vid card. http://discussions.apple.com/message.jspa?messageID=5681200#5681200

Similar Messages

My iphone 3gs is acting weird, every time i get a call or if i try and call some one my iphone gets random black lines down it) so what can I do to fix it?

My iphone 3gs is acting weird, every time i get a call or if i try and call some one my iphone gets random black lines down it) so what can I do to fix it?

Try:
- Reset the iOS device. Nothing will be lost
Reset iOS device: Hold down the On/Off button and the Home button at the same time for at
least ten seconds, until the Apple logo appears.
- Reset all settings
Go to Settings > General > Reset and tap Reset All Settings.
All your preferences and settings are reset. Information (such as contacts and calendars) and media (such as songs and videos) aren’t affected.
- Restore from backup
- Restore to factory settings/new iOS device.
- Make an appointment at the Genius Bar of an Apple store.
Apple Retail Store - Genius Bar

Random black lines in different application screens

My MacBook Pro is displaying random black lines across the screen on various applications. They stay on the screen even if I scroll up and down, but don't go onto background applications or the desktop. Has anyone else had this issue?
I'd be happy to email a screenshot.

Uninstalled iTunes completely and found a older firmware for the iPod. Installed it. Then installed the iTunes 7 but did not have the iTunes update the iPod. Worked like a charm! No more black lines.

Random Black Line in iPhoto Calendar

I have a random black vertical line in the middle of each months page of dates. How do I get rid of it? I came out in print last year and it is visible on the template despite any background choice.
Thanks

What the theme you tried in the other user account the same as in the problem calendar?
If it was and since you didn't get the line when using iPhoto in the other user account it could be a preference file other than iPhoto's causing the problem. Here's how that can be tested:
Trouble Shooting Preferences
NOTE: In Lion and Mountain Lion the Home/Library folder is now invisible. To make it permanently visible enter the following in the Terminal application window: chflags nohidden ~/Library and press the Return key - 10.7: Un-hide the User Library folder.
If you're running Mavericks, 10.9, go to your Home folder and use the View ➙ Show View Options menu to bring the this window:
1 - close all applications.
2 - open your Home/Library folder and Option-drag (copy) the Preferences folder to the Desktop.
3 - select the contents of your Home/Library/Preferences folder and drag them into the Trash bin in the Dock. You will be asked to provide your Admin password.
4 - reboot. Be sure to know your account's username and password as you will be asked to log in with it.
5 - run the application again and determine if the problem(s) is fixed.
6 - If the problem is fixed:
A - open the working Home/Library/Preferences folder.
B - Open the Preferences folder on the Desktop, select all of the contents and drag them into the working Home/Library/Preferences folder.
C - When the Copy window pops up check the "Apply to All" check box and then click on the Don't Replace or Skip button.
D - reboot.
7 - If the problem is NOT fixed, drag the contents of the Preference folder on the Desktop into the Home/Library/Preference folder and replace the entire contents that were created by clicking on Replace.
8 - reboot and you're back as square one.
Note: keep the Preference folder on the desktop until you're sure all registration info for your apps are working. If not you can copy the required files from the desktop pref folder to the working one.

Black Line under Linked Image

Hey, I have started another website for my portfolio, consisting of many pages. Anyway, I'm mainly using CSS, but there is a little HTML for the navigation.
Heres the question: When I linked the top banner image to go to the Home page (index.html), there is a random black line under the image. I gave the image and ID tag in CSS and made sure that border:0;
Please respond, I desperatly need this for a school project and it will look random if there is a weird line in the middle of the page. Thanks in advance!

Here is the CSS code
@charset "utf-8";
/* CSS Document */
html {
     background-color: #F1D66B;
     background-image: url(../Images/Background.png);
     font-family: "Showcard Gothic", "Cooper Std Black", Calibri, serif;
     word-spacing: 6px;
body {
     background-color: #F9ECB9;
     margin: 0 auto;
     width: 700px;
     padding: 20px;
     word-spacing: 0px;
h1 {
     font-size: 38px;
     text-decoration: underline;
     font-variant: small-caps;
     font-weight: bold;
     margin-bottom: 40px;
h2 {
     font-size: 28px;
     text-decoration: underline;
     font-variant: small-caps;
h3 {
     margin-top: 20px;
     font-size: 16px;
     background-color: #F1D66B;
     padding: 15px;
     padding-top:40px;
     padding-bottom:40px;
     text-align: center;
     margin-top: 100px;
     word-spacing: 0px;
     font-family: Georgia, "Times New Roman", Times, serif;
     font-weight: bolder;
     font-variant: small-caps;
h4 {
     font-size: 50px;
     text-decoration: underline;
     font-variant: small-caps;
     font-weight: bolder;
     margin-left: 0px;
     margin-right: 0px;
     margin-top: 20px;
     margin-bottom: 20px;
     text-align: center;
p {
     font-size: 20px;
     font-family: Georgia, "Times New Roman", Times, serif;
     text-indent: 40px;
     margin-bottom: 70px;
ul {
     font-family: Georgia, "Times New Roman", Times, serif;
     font-size: 20px;
strong {
     font-weight: 1200;
a {
     text-decoration:none;
a:link {
     color: #000;
     text-decoration: underline;
a:visited {
     color: #000;
     text-decoration: underline;
a:hover {
     color:#846B0D;
     text-decoration: underline;
div{
     bakcground-color: #7C9614;
     text-decoration: underline;
#logo{
     border-bottom: 10px;
h5 {
     text-align: center;
     margin: 0 auto;
a img{
     border: none;
     text-decoration: none;
And here is the HTML for my index.html page
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Spinoff - Home</title>
<link href= "CSS.css" rel="stylesheet" type="text/css" />
<script type="text/javascript">

</script>
</head>
<body>
<h4><a href="index.html"><img src="../Images/Logo.jpg" name="logo" width="700" height="200" border="0" id="logo" /></a></h4>
<table border="0" cellpadding="0" cellspacing="0">
<tr>
    <td width="230"><a href="gameshome.html" target="_top" onclick="MM_nbGroup('down','group1','Games','',1)" onmouseover="MM_nbGroup('over','Games','','',1)" onmouseout="MM_nbGroup('out')"><img src="../Images/Games.jpg" alt="" name="Games" border="0" id="Games" onload="" /></a></td>
    <td width="230"><a href="videoshome.html" target="_top" onclick="MM_nbGroup('down','group1','Videos','',1)" onmouseover="MM_nbGroup('over','Videos','','',1)" onmouseout="MM_nbGroup('out')"><img src="../Images/Videos.jpg" alt="" name="Videos" border="0" id="Movies" onload="" /></a></td>
    <td width="219"><a href="photoshome.html" target="_top" onclick="MM_nbGroup('down','group1','Photos','',1)" onmouseover="MM_nbGroup('over','Photos','','',1)" onmouseout="MM_nbGroup('out')"><img src="../Images/Photos.jpg" alt="" name="Photos" border="0" id="Photos" onload="" /></a></td>
</tr>
</table>
<h2>Welcome!</h2>
<p>Welcome to the home page of <strong>Spin-Off</strong> media! Hey, thanks for coming! As you can see, we have many games, videos and photos for you! We hope you enjoy your stay, and come back! Well, what are you waiting for? Get clicking!</p>
<h2>Submissions</h2>
<p>We welcome your submissions here at spin-off! Got a game you want other people to play? Think some people will get a good laugh at your home video? Have a photo you think some people will get a kick out of? Send it to us HERE and we will review it before posting. Please, put the file in the attachment, as well as any title and description you want in the body.</p>
<p><strong>*NOTE* </strong>Any submissions that do not pass will not be notified, in fact, nobody will be notified. If you see it on the site, congratulations, you have something ahead of you kid. If not, keep trying!</p>
<h3>Not-So-Copyrighted - Spinoff Media<br />
<a href="index.html">[home]</a> <a href="gameshome.html">[games]</a> <a href="videoshome.html">[videos]</a> <a href="photoshome.html">[photos]</a><br />
<a href="mailto:[email protected]?subject=Spin-Off">[contact]</a> <a href="legal.html">[legal]</a> <a href="mailto:[email protected]?subject=Submission">[submit]</a> <a href="about.html">[about]</a><br />
NSFW? Tell us <a href="mailto:[email protected]?subject=NSFW">HERE</a> and we will respond</h3>
</body>
</html>
The little black line happens right under the first h4

IPad Crashes-Black Lines and makes random restarts

This barely happens before on my ipad until recently my teacher confiscates my ipad. After this going on, my ipad kept on undergoing multiple crashes and restarts. When I was rotating my screen or opening an app, it shows black lines and restarts by its own.
I tried system reset and restore but none of it seems to work.
Here is the system diagnostics for the crash:
{"os_version":"iOS 8.0.2 (12A405)","bug_type":"110"}
Incident Identifier: 953608D1-09CF-4B9E-A2B2-F1B504534874
CrashReporter Key:   e669fec46b9c53c7ff9529a93d02456c675e4851
Hardware Model:      iPad2,2
Date/Time:           2014-10-07 11:20:43.190 +0700
OS Version:          iOS 8.0.2 (12A405)
panic(cpu 0 caller 0xa042a347): "i2c2::_checkBusStatus Bus is still in a bad state; last read status 00010110 xfer 00000000 fifo 00000000 for device gyro"
Debugger message: panic
OS version: 12A405
Kernel version: Darwin Kernel Version 14.0.0: Thu Sep 18 21:52:05 PDT 2014; root:xnu-2783.1.72~23/RELEASE_ARM_S5L8940X
Kernel slide:     0x000000001fc00000
Kernel text base: 0x9fc01000
Boot    : 0x5432bc03 0x00000000
Sleep   : 0x543309af 0x000dd11e
Wake    : 0x54330d4c 0x0005a2a3
Calendar: 0x54335fba 0x000a5776
Panicked task 0xa12e7c60: 13728 pages, 112 threads: pid 0: kernel_task
panicked thread: 0x811112e0, backtrace: 0x8f4abd50
0x9fcad949
0x9fcadca9
0x9fc1d4a5
0xa042a347
0xa042a059
0xa0429e35
0xa009b611
0xa009b523
0x9fef6741
0xa009bc7d
0xa009bcd5
0xa0589a11
0xa05867f1
0x9fef8a01
0x9fc3ec03
0x9fcab59c
Task 0xa12e7c60: 13728 pages, 112 threads: pid 0: kernel_task
Task 0xa12e7948: 808 pages, 7 threads: pid 1: launchd
Task 0xa12e7630: 2284 pages, 31 threads: pid 17: UserEventAgent
Task 0xa12e7000: 720 pages, 2 threads: pid 18: misd
Task 0xa12e7318: 2424 pages, 14 threads: pid 19: CommCenterClassi
Task 0xa4ebe948: 247 pages, 2 threads: pid 21: keybagd
Task 0xa4ebe318: 755 pages, 2 threads: pid 23: iaptransportd
Task 0xa4ebe000: 1021 pages, 10 threads: pid 24: configd
Task 0xa519cc60: 915 pages, 2 threads: pid 25: lockdownd
Task 0xa519c948: 1153 pages, 4 threads: pid 26: imagent
Task 0xa519c630: 846 pages, 2 threads: pid 27: fairplayd.A1
Task 0xa519c318: 2865 pages, 4 threads: pid 28: atc
Task 0xa54adc60: 1279 pages, 4 threads: pid 30: routined
Task 0xa54ad318: 940 pages, 3 threads: pid 33: timed
Task 0xa5419c60: 854 pages, 3 threads: pid 35: installd
Task 0xa5419948: 2776 pages, 14 threads: pid 36: mediaserverd
Task 0xa5419318: 259 pages, 7 threads: pid 38: syslogd
Task 0xa5419000: 414 pages, 2 threads: pid 39: softwareupdated
Task 0xa5508c60: 1075 pages, 5 threads: pid 40: mediaremoted
Task 0xa5508948: 1514 pages, 6 threads: pid 41: identityservices
Task 0xa5508630: 12372 pages, 20 threads: pid 42: SpringBoard
Task 0xa5508318: 564 pages, 3 threads: pid 43: fileproviderd
Task 0xa5508000: 1279 pages, 2 threads: pid 44: familynotificati
Task 0xa5771c60: 1130 pages, 4 threads: pid 45: tipsd
Task 0xa5771630: 253 pages, 5 threads: pid 47: fseventsd
Task 0xa5771318: 7
Thanks in Advance
This barely happens before on my ipad until recently my teacher confiscates my ipad. After this going on, my ipad kept on undergoing multiple crashes and restarts. When I was rotating my screen or opening an app, it shows black lines and restarts by its own.
I tried system reset and restore but none of it seems to work.
Here is the system diagnostics for the crash:
{"os_version":"iOS 8.0.2 (12A405)","bug_type":"110"}
Incident Identifier: 953608D1-09CF-4B9E-A2B2-F1B504534874
CrashReporter Key:   e669fec46b9c53c7ff9529a93d02456c675e4851
Hardware Model:      iPad2,2
Date/Time:           2014-10-07 11:20:43.190 +0700
OS Version:          iOS 8.0.2 (12A405)
panic(cpu 0 caller 0xa042a347): "i2c2::_checkBusStatus Bus is still in a bad state; last read status 00010110 xfer 00000000 fifo 00000000 for device gyro"
Debugger message: panic
OS version: 12A405
Kernel version: Darwin Kernel Version 14.0.0: Thu Sep 18 21:52:05 PDT 2014; root:xnu-2783.1.72~23/RELEASE_ARM_S5L8940X
Kernel slide:     0x000000001fc00000
Kernel text base: 0x9fc01000
Boot    : 0x5432bc03 0x00000000
Sleep   : 0x543309af 0x000dd11e
Wake    : 0x54330d4c 0x0005a2a3
Calendar: 0x54335fba 0x000a5776
Panicked task 0xa12e7c60: 13728 pages, 112 threads: pid 0: kernel_task
panicked thread: 0x811112e0, backtrace: 0x8f4abd50
0x9fcad949
0x9fcadca9
0x9fc1d4a5
0xa042a347
0xa042a059
0xa0429e35
0xa009b611
0xa009b523
0x9fef6741
0xa009bc7d
0xa009bcd5
0xa0589a11
0xa05867f1
0x9fef8a01
0x9fc3ec03
0x9fcab59c
Task 0xa12e7c60: 13728 pages, 112 threads: pid 0: kernel_task
Task 0xa12e7948: 808 pages, 7 threads: pid 1: launchd
Task 0xa12e7630: 2284 pages, 31 threads: pid 17: UserEventAgent
Task 0xa12e7000: 720 pages, 2 threads: pid 18: misd
Task 0xa12e7318: 2424 pages, 14 threads: pid 19: CommCenterClassi
Task 0xa4ebe948: 247 pages, 2 threads: pid 21: keybagd
Task 0xa4ebe318: 755 pages, 2 threads: pid 23: iaptransportd
Task 0xa4ebe000: 1021 pages, 10 threads: pid 24: configd
Task 0xa519cc60: 915 pages, 2 threads: pid 25: lockdownd
Task 0xa519c948: 1153 pages, 4 threads: pid 26: imagent
Task 0xa519c630: 846 pages, 2 threads: pid 27: fairplayd.A1
Task 0xa519c318: 2865 pages, 4 threads: pid 28: atc
Task 0xa54adc60: 1279 pages, 4 threads: pid 30: routined
Task 0xa54ad318: 940 pages, 3 threads: pid 33: timed
Task 0xa5419c60: 854 pages, 3 threads: pid 35: installd
Task 0xa5419948: 2776 pages, 14 threads: pid 36: mediaserverd
Task 0xa5419318: 259 pages, 7 threads: pid 38: syslogd
Task 0xa5419000: 414 pages, 2 threads: pid 39: softwareupdated
Task 0xa5508c60: 1075 pages, 5 threads: pid 40: mediaremoted
Task 0xa5508948: 1514 pages, 6 threads: pid 41: identityservices
Task 0xa5508630: 12372 pages, 20 threads: pid 42: SpringBoard
Task 0xa5508318: 564 pages, 3 threads: pid 43: fileproviderd
Task 0xa5508000: 1279 pages, 2 threads: pid 44: familynotificati
Task 0xa5771c60: 1130 pages, 4 threads: pid 45: tipsd
Task 0xa5771630: 253 pages, 5 threads: pid 47: fseventsd
Task 0xa5771318: 7
Thanks in Advance

Hi kimmichelle1912,
Thank you for using Apple Support Communities.
From your post I understand that your iPad is unexpectedly restarting on you. To resolve this issue I'd like you to please follow the steps below.
Make sure your iOS device is up to date. If you still see this issue after updating, contact Apple Support.
Learn what to do if your iOS device won't start up past Apple logo or doesn't respond.
iOS: Device unexpectedly restarts, displays Apple logo, or powers off
Take care,
Alex H.

How to fix black horizantal black lines on 2010macbook pro 17' screen?

Hi everyone!
I come to the community for help after looking everywhere on the internet. I've had a problem now with my computer for a while where these strange black lines (always horizontal in nature) appear on my screen. I have two pictures below:
http://i1250.photobucket.com/albums/hh521/violentfirebomb/blacklines02_zps5de5cc 51.jpg
http://i1250.photobucket.com/albums/hh521/violentfirebomb/blacklines01_zpsfe260c 8d.jpg
These black lines will appear out of no where and they won't go away unless I select whatever is there and move my mouse. If it's across some font, I can select the font and easily go over the black line and it'll disappear.
Also, the more permanent things is random drop shadows from open windows won't work or the shadow won't work in places. Sometimes the font below a folder or above an icon on my dock will just be gone, like a chunk of it missing the size of those black lines you see in pictures above.
Is it something I can fix? Should I take it into the genius bar? My computer is a 17' Macbook Pro from 2010 and I'll be honest, this never happened until I upgraded to Mountain Lion. I even reinstalled Mountain Lion but the black lines and random text as well as drop shadow disappearances have returned.
Let me know what everyone thinks! I'd like to solve this mystery as quickly as I can! Thanks in advance.
Leslie

When you have problems with the display, there are usually three possibilities: The wire connection is faulty, the display is faulty or the GPU is having problems. All are are hardware issues that cannot be solved by software and generally do not fall into the do it yourself category.
Ciao.

Printing to Canon S9000 Issue - Black Lines - Mac

All,
Having some issues (assume Driver) with printing from LR 2.3 and CS3 going to Canon S9000. Printing from Preview is fine. However iPhoto shows the same thing. I am getting evenly spaced (about 5mm apart) thin black lines when printing. It is consistent across different papers, including Canon Photo Paper Pro. I called Canon yesterday, and the fact that Preview works fine would seem to indicate something with the driver and Adobe and iPhoto. I'm not talking a microbanding. These are very distinct black lines. I've tried letting the printer manage the color, I've also tried using profile with the printer. I am using the most current BJ driver from the Canon site for the Mac (Leopard) and the printer.
Images from QImage on my Windows machine are also fine to the printer with I have it hooked up there.. Could use some help in debugging (hopefully without using up all the ink) :-)
Also getting occasional random "LR unexpected termination" message after printing.. One time happens, another doesn't.. No rhyme or reason I can see.
Update: Unexpected Termination seems to happen more often when stacking up a few prints in the print queue.
Jay S.

Even worse...
we have three machines updated today and the exact same problem on each of them:
Indesign CS3, Acrobat 8
Printing to Distillers Virtual Printer.
Previously Pages were PDF-ed in the format they had.
Now they are NOT - they all are on A4. The PDF-Options of Apple mess up the PDF-Options of Indesign. Apples PDF-Options do no longer ignore the pagesize, but overwrite the Indesign-Options.
This is a MAJOR bug for us, as any output into high-res-PDF for printing doesn't work via export, but via Printing to Distiller. This is a big big sucky thing, which Adobe or Apple will hopefully fix soon.

Horizontal black lines

horizontal broken black lines on macbook pro screen that change when scrolling up and down, mainly in Safari. Could this be a Snow Leopard issue?

I am getting the same thing. However my black lines are showing up in random spots, like the desktop or login window.
I also have a MacBook Pro 2 GHz Intel Core Duo running Mac OS X 10.6.8. I am also having hard lock freezes. Where in some cases I can still use the mouse and in others nothing works. A majority of times I get the spinning ball. Although it doesn't always show up when the freeze first occurs. I will close the lid and three fourths of the time it will eventually go to sleep and I can wake it back up again. A third of the time when I wake it back up I get a black menu bar (I can no longer see light colored menu bar across the top of the screen; "Safari", "File", "Edit", "View", "History", etc) On these occassions I am able to find the menu to quit or to select in the general area of the "Apple Menu" then it pops up in the light color and I can read the text to select shut down. I have found that logging out and back in corrects the issue.
I will create a test account tonight to see if the issue goes away and is 'profile' related.
What are the specs on your machine; Processor Speed, Machine model etc?
I was leaning towards this being a hardware issue as it is a common issue that was showing up. Apple was covering a logic board replacement for the logic board on that model. Although maybe it is a software issue in our case. Let me know if you find out anything on your end.
Thanks,
Jon

Black line through dock

Hey,
Basically i've just realised that sometimes when im on my computer, theres a thin black line going straight through the dock horizontally..
It's very thin and doesnt affect me opening any programmes, but its just annoying really..
I tried taking a screen shot but it didn't show up on the picture..
An odd one.. hopefully some of you mac geniuses have an idea
Cheers,

Its only sometimes though, and doesn't appear to be a monitor fault.. surely if it was a monitor fault it would be random pixels? This seems to be a perfect horizontal line across the lower screen.. Being a student i cant really afford to take my monitor into be serviced incase there's nothing wrong with it..

My ipod screen is white with small vertical lines with one big black line in the middle

My ipod's screen turned white and had a few thin vertical lines and 1 thick black line in the center. the ipod can still play music but i have to randomly press the icons by memory to play music since I cannot figure out where the icons are. It all started after downloading a free app. I was browsing my ipod when the screen turned white. I already restored it to its original settings. I don't remember dropping my ipod. Help!

Since restoring the iPod to factory defaults/new iPod did not solve the problem it appears that you have a hardware problem. I would make an appointment at the Genius Bar of an Apple store.

What is the meaning of the black line in the Layer 2 View?

In the layer 2 View,there are many black line indicate "Ethernet 100M",what is the meaning?Does it mean the device is an end device that connected PC only?

Since there has been no response to your post, it appears to be either too complex or too rare an issue for other forum members to assist you. If you don't get a suitable response to your post, you may wish to review our resources at the online Technical Assistance Center (http://www.cisco.com/tac) or speak with a TAC engineer. You can open a TAC case online at http://www.cisco.com/tac/caseopen
If anyone else in the forum has some advice, please reply to this thread.
Thank you for posting.

What causes my mac computer screen to flash scramble words and black line across the screen when on the internet

my computer when on the internet cause black lines to show up accross the cuputer screen and word scrambled. How can I stop this from happening

Reset SMC.     http://support.apple.com/kb/HT3964
    Choose the method for:
    "Resetting SMC on portables with a battery you should not remove on your own".
Sleep function OS X Mavericks:
   http://support.apple.com/kb/HT5869

HP Officejet Pro 8500A Plus - vertical black lines only when autofeed

I have multiple black lines (darkest about 3 inches from left) when I autofeed a print document. When I feed a clean sheet, I get the single dark line. There are no lines if I copy using the top glass, I followed the HP autofeed cleaning instructions TWICE. The white rollers were clean and only slight black smudge on the black rollers. I am certain this has happened to others...Oh yes, my HP warranty expired in late March (Costco may cover it if this is not a simple fix).
I would appreciate any assistance, as this has been a great printer.

This article should help out with the problem you are facing. Give the steps outlined a try and let us know if it helps.
Best of Luck!
You can say thanks by clicking the Kudos Star in my post. If my post resolves your problem, please mark it as Accepted Solution so others can benefit too.

Apple IMac 27 has a problem. Random black screen. Over 1 year without any fix

Apple IMac 27 has a problem.
Random black screen.
Over 1 year without any successful fix.
IMac 27 10.8.4 (12E55) - bought in 2010
3.06 GHz Intel Core 2 Duo
4GB 1067 Mhz RAM
Graphics ATI Radeon HD 4670 256 MB
The IMac computer screen goes black randomly but the machine still running beyond.
In order to go back to normal i need to awake the computer by hitting with the pointer a hot corner previously created " sleep mode" ( top left ).
..the black screen would come back after one second again..and then again and then again and then again..with different intervals..sometime 2 seconds after the other, sometime as soon as appears the user login screen.
I took the machine to an Apple Store two times over one year, they opened, cleaned it but they didn't replace anything has they could not understand what they real problem was. I was happy for that because they didn't try to make me spend money on something which was not going to solve my issue for sure.
Last time i kindly asked them to inspect everything meticulously, part by part, i left the machine with them for over 2 months. They couldn't understand why this was happening..after couple of weeks, 5 more machines came in with the same problem.
On some of them., upon request of the client they changed the graphic card but apparently this was not the fix, the problem come back again. Apparently changing the graphic card or the screen or else it didn't solve any problem to anyone. I'm almost thinking to "trough it out of the window"..we all spend money for this machines and i think we need to know if Apple is looking in to this or not.
Lately i tried to do an SMS RESET and PRAM RESET, it feels it got better a little but problem still coming back.
Also, all usb devices are disconnected and the problem still there
Below you will see a copy of the console report. I honestly don't understand much of it as i'm not a computer guy.
27/07/2013 11:03:39.837 WindowServer[119]: Created shield window 0xb3 for display 0x04272d40
27/07/2013 11:03:39.837 WindowServer[119]: device_generate_desktop_screenshot: authw 0x7fad92c79dc0(2000), shield 0x7fad92c34370(2001)
27/07/2013 11:03:39.906 WindowServer[119]: device_generate_lock_screen_screenshot: authw 0x7fad92c79dc0(2000), shield 0x7fad92c34370(2001)
27/07/2013 11:03:41.701 WindowServer[119]: handle_will_sleep_auth_and_shield_windows: releasing authw 0x7fad92c79dc0(2000), shield 0x7fad92c34370(2001), lock state 3
27/07/2013 11:03:41.702 WindowServer[119]: handle_will_sleep_auth_and_shield_windows: err 0x0
27/07/2013 11:03:41.704 WindowServer[119]: Created shield window 0xb4 for display 0x003f003d
27/07/2013 11:03:41.704 WindowServer[119]: handle_will_sleep_auth_and_shield_windows: releasing authw 0x7fad92c79dc0(2002), shield 0x7fad92c34370(2001), lock state 3
27/07/2013 11:03:41.704 WindowServer[119]: handle_will_sleep_auth_and_shield_windows: err 0x0
27/07/2013 11:03:45.186 com.apple.launchd.peruser.502[163]: (com.akamai.client.plist[740]) Bug: 12E55: launchd + 95444 [7DCC9489-2DF5-3807-83FA-EF5666EE8078]: 0xd
27/07/2013 11:03:45.208 com.apple.launchd.peruser.502[163]: (com.akamai.client.plist) Throttling respawn: Will start in 10 seconds
27/07/2013 11:03:52.117 WindowServer[119]: CGXSetWindowBackgroundBlurRadius: Invalid window 0xffffffff
27/07/2013 11:03:52.118 loginwindow[43]: find_shared_window: WID -1
27/07/2013 11:03:52.118 loginwindow[43]: CGSGetWindowTags: Invalid window 0xffffffff
27/07/2013 11:03:52.118 loginwindow[43]: find_shared_window: WID -1
27/07/2013 11:03:52.118 loginwindow[43]: CGSSetWindowTags: Invalid window 0xffffffff
27/07/2013 11:03:53.763 WindowServer[119]: Created shield window 0xba for display 0x04272d40
27/07/2013 11:03:53.763 WindowServer[119]: device_generate_desktop_screenshot: authw 0x7fad92c87490(2000), shield 0x7fad92e6eef0(2001)
27/07/2013 11:03:53.838 WindowServer[119]: device_generate_lock_screen_screenshot: authw 0x7fad92c87490(2000), shield 0x7fad92e6eef0(2001)
27/07/2013 11:03:53.880 WindowServer[119]: handle_will_sleep_auth_and_shield_windows: releasing authw 0x7fad92c87490(2000), shield 0x7fad92e6eef0(2001), lock state 3
27/07/2013 11:03:53.880 WindowServer[119]: handle_will_sleep_auth_and_shield_windows: err 0x0
27/07/2013 11:03:53.883 WindowServer[119]: Created shield window 0xbb for display 0x003f003d
27/07/2013 11:03:53.883 WindowServer[119]: handle_will_sleep_auth_and_shield_windows: releasing authw 0x7fad92c87490(2002), shield 0x7fad92e6eef0(2001), lock state 3
27/07/2013 11:03:53.883 WindowServer[119]: handle_will_sleep_auth_and_shield_windows: err 0x0
27/07/2013 11:03:55.209 com.apple.launchd.peruser.502[163]: (com.akamai.client.plist[742]) Bug: 12E55: launchd + 95444 [7DCC9489-2DF5-3807-83FA-EF5666EE8078]: 0xd
27/07/2013 11:03:55.252 com.apple.launchd.peruser.502[163]: (com.akamai.client.plist) Throttling respawn: Will start in 10 seconds
27/07/2013 11:04:04.482 WindowServer[119]: CGXSetWindowBackgroundBlurRadius: Invalid window 0xffffffff
27/07/2013 11:04:04.482 loginwindow[43]: find_shared_window: WID -1
27/07/2013 11:04:04.483 loginwindow[43]: CGSGetWindowTags: Invalid window 0xffffffff
27/07/2013 11:04:04.483 loginwindow[43]: find_shared_window: WID -1
27/07/2013 11:04:04.483 loginwindow[43]: CGSSetWindowTags: Invalid window 0xffffffff
27/07/2013 11:04:04.704 WindowServer[119]: Created shield window 0xbf for display 0x04272d40
27/07/2013 11:04:04.726 WindowServer[119]: device_generate_desktop_screenshot: authw 0x7fad92ebdb20(2000), shield 0x7fad92e6eef0(2001)
27/07/2013 11:04:04.795 WindowServer[119]: device_generate_lock_screen_screenshot: authw 0x7fad92ebdb20(2000), shield 0x7fad92e6eef0(2001)
27/07/2013 11:04:05.245 WindowServer[119]: handle_will_sleep_auth_and_shield_windows: releasing authw 0x7fad92ebdb20(2000), shield 0x7fad92e6eef0(2001), lock state 3
27/07/2013 11:04:05.246 WindowServer[119]: handle_will_sleep_auth_and_shield_windows: err 0x0
27/07/2013 11:04:05.253 com.apple.launchd.peruser.502[163]: (com.akamai.client.plist[744]) Bug: 12E55: launchd + 95444 [7DCC9489-2DF5-3807-83FA-EF5666EE8078]: 0xd
27/07/2013 11:04:05.249 WindowServer[119]: Created shield window 0xc0 for display 0x003f003d
27/07/2013 11:04:05.249 WindowServer[119]: handle_will_sleep_auth_and_shield_windows: releasing authw 0x7fad92ebdb20(2002), shield 0x7fad92e6eef0(2001), lock state 3
27/07/2013 11:04:05.249 WindowServer[119]: handle_will_sleep_auth_and_shield_windows: err 0x0
I'm now thinking to try to take the machine to its original firmware and see if it still does it, does anyone have any sugestion?
I use a lot photoshop and other image software, this computer is essential for my work. For more then one year this issue caused me problems.
Luckly i have a Macbook Pro too and i managed to do some of my work there. At last I was thinking to buy an external screen and attach it to the Macbook pro in order to work on my big images. But who wants to spend money again!!!???? This is not a fixture, this is silly. I wish to have my IMAc working again.
The warranty it's obviously over and this problem happened right after the warranty was over...
I write this post because i'm so tired of this issue and online nothing can be found apart from posts from so many people that have the same problem and no fixture has been found.
The only fixture seams to be to buy a new computer... Ole'!!!..new money flowing in in the cashier!! forget it!!! i would rather change company if apple doesn't respond to this.
For over 10 years i have been a Apple owner..
When this problem appears it's like someone it's playing a joke at you...
Comments welcome..
Thanks

Hi, I've seem to have found out the source of the problem.
The issue is related to heat, and an iMac 27" gets hot pretty fast.
If I boot the iMac straight after first start into Windows 7 I seem to get a lit built-in display at all times. I can also boot OS X first and then into Windows 7 and the built-in screen get lit every time as long as the iMac isn't hot.
Strange thing is that the monitor connected to the display port gets lit every time. So I can only assume that the heat only interfere with output to the built-in LED screen.
So this iMac is going to an Apple premium reseller for service, and I'll tell you guys how it went.

Random black lines

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