Software :: Flashing Horizontal Flicker On EMac Display
Aug 25, 2008
I have an EMac G4 that has a number of problems, It is a 1.25gz. Sometimes it will boot to a blue, blank screen, on holding down the alt key I see the boot drive and I can start up (10.4os) but will go to the blue screen again. When it does start up properly, which it does for no apparent reason, there are little dash shaped spots on the screen and a flashing horizontal flicker. I ran fsck and disk utility and installed a fresh version of 10.4 to no avail. I do not have the original disks so cannot run hardware test. The computer falls under the Apple emac screen repair but they will not accept it because it is out of the three year time limit, very frustrating and unfair.
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May 7, 2012
My imac screen has just started flickering. I have researched it and it already a problem with other mac's.
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Dec 12, 2010
My brother has a second gen, 800Mhz eMac (the one that could be overclocked to 1.33Ghz - the earlier PC133 ram model). Since about 1.5 mths ago, when he powers it on, sometimes it will not power on, and other times it will give three beeps (diagnostic pages say bad RAM) and a flashing power/sleep light in unison with the beeps. Did this vintage suffer bad caps? I recall that it was only the 1.25Ghz model that had bad caps, but I could be wrong.
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Jun 21, 2010
i've got a little problem with my Mac Book Pro.
I have a white line in the display where I also have my dock. So it's not always on the same Display. You can see a few pictures attached that show you that this line is some kind of weird. Windows that are always in the front like "About my Mac" are over this line and if I open all windows of one program I get three of those lines.
The lines are here since I updated my MacBook to the newest firmware.
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Oct 16, 2008
when I woke my pbook up the screen had a horizontal line across it, and below that there is doubling and tripling of the screen image going on. Rebooting didn't accomplish anything and when I take a screenshot it doesn't show up there. I have a 12" Powerbook G4, running os 10.4.11.
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Jul 30, 2010
There are a bunch of horizontal lines that're plaguing my iMac. What's causing this?
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Aug 31, 2014
I have a 2007 Mac Pro 1,1 with attached 24" apple display and utilizing 5 GB Ram and maxed out on internal hard drives. It's been a flawless workhorse and I mostly tax it with Photoshop which it does well. Well, yesterday, I was viewing a small video on my Mac when this issue occurred. Suddenly I saw these squiggly looking horizontal lines on my display. Then I saw a spinning beach ball. I had to shut down.
I double checked my display cables in case any were loose - no issues. Restarted without issue. Went back to work on my computer - no issues doing ordinary tasks such as opening windows, moving files and surfing the internet. Went back into Photoshop and resized several dozen images without issue. Then, this happened again... restarted. Zapped PRAM just in case. Fired up Tech Tool Deluxe (older version 3.1.3) and it found NO problems, I passed all tests.
Then... out of nowhere it crashed again, third time... I don't recall what I was doing to be honest. I shut down my Mac last night and this morning have spent an hour on and so far, so good. However, I'm not taxing it by doing anything intense. I need to use Photoshop for a project I'm working on so I will do that soon and see if this issue repeats.
I've tried searching the forums but can't find anything conclusive to my specific issue. What else should I do? What else should I check? Is this hardware or a software issue? I have temperature monitor installed - should I be looking at specific temperature increases and if so, where?
GPU going bad on logic board? This is a really close up image taken with my iphone, obviously the lines aren't this large.
Info:
Mac Pro, Mac OS X (10.6.8)
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Jan 1, 2010
My iMac boots up (OSX 10.4) and when the desktop is about to appear the little spinning wheel start to get "fuzzy" (yes only the wheel), then when it's time for the desktop to appear the entire screen goes blue with horizontal lines across it. I can see nothing on the screen at all except that mess.
Weird thing is, if I boot using the install disc, everything is fine. he display never screws up. So I am guessing some file or something is corrupted in OSX?
I was going to do a restore, but since there have been some updates since I got it, I am worried about that whole process and not being able to get to my pictures and what not on the HD. The procedure where I can archive the current OS and reinstall the original seems like my next step.
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Jun 14, 2012
Occasionally there are random horizontal lines on my display. Computer sometimes freezes or screen turns black requiring a hard restart.
Info:
iMac, Mac OS X (10.6.8)
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Sep 5, 2014
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.
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Mar 4, 2010
Why does it seem like my eMac display looks nicer than my iMac display? I always wanted to know or am I tripping?
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Jan 27, 2009
I have a 2.8GHz Intel Core 2 Duo 24 inch iMac in may-june 2008. I bought it because I wanted to avoid the 20 inch display problems. Somehow I feel I ended up with the wrong side of the deal. Check the snapshot please:
The picture was taken using my iPhone so it's not exacty Cannon quality, but still, it describes my problem in 1000 words
What would you do in my place. Would you risk getting another one, maybe a crappier one? It is ludicrous that you take part in a russian lottery when buying a fairly expensive product like a Mac.
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Mar 13, 2012
I'm running 8GB RAM as I have been for several months now. I typically run several apps at a time for days at a time rarely dipping below 1GB available. When I do I use the Free Memory app to free up RAM.
Minutes ago I left my MBP for a couple minutes to do something across the room. It began making single short beeps spaced a couple seconds apart. When I ran over to check out what was going on I noticed the display had 2-3 vertical stripes through it each containing dozens of horizontal colored bars. The beeps continued without stopping. The display was unusable for the duration. I could not tell if th keyboard or trackpad were responding so I chose ot reboot.
After reboot it seemed fine and reopened all of the apps that had been running previously. Or is this a sign of specific hardware beginning to fail?
Info:
Mac OS X (10.7.3), Early 2011 MBP 13"
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Jul 1, 2014
my MacBook pro display that there are frequently horizontal grey lines going across my screen. I've noticed it mostly when the display color should be grey or white, but that's not always the case. It occurs mostly in my Google search bar using Firefox, and also occurs heavily on Facebook in the comments/reply section of a post. Outside of the browser I've also seen it when looking through some personal photos, especially of the sky, the lines will seem to sort of outline different contrasts in white or light tones, kind of like the Magic Wand tool would do in Photoshop. The lines do flicker and change when scrolling.I attempted to snap a photo with my iPhone the best I could.
My specs:
-13" Macbook Pro (2009)
-Intel Core 2 Duo 2.26 GHz
-NVIDIA GeForce 9400M
-Resolution: 1280x800, 32-bit Color
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Sep 10, 2014
After 1 month there are small thin horizontal lines appear on my macbook pro screen. i never drop or bang or what so ever.
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Aug 24, 2014
Microsoft word for mac 2011 ver 14.4.3
I need to see how many spaces from the left edge my cursor is.
Info:
MacBook Air, OS X Mavericks (10.9.4)
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Jul 9, 2009
So I had a recently purchased 17" BTO with the 7200RPM drive that worked great, but with one issue - the display would have horizontal scan lines and black out occasionally. So I called up Apple and eventually managed to get a cross-ship set up(they let me hold on to my current unit, charge my credit card and send me a second brand new 17" unit as a replacement,and then refund me for the second 17" after I send back the defective unit).
Anyway, the replacement unit looks great, but with one issue - there's a very small light dent on the bottom panel(maybe about the size of a dime). I was annoyed but don't think this is worth having to exchange, since I could probably just unscrew the panel and pop it back into place.
However, what really got to me was the fact that my replacement unit was slightly louder than my original - my original is so silent that I can't even tell it's on. However, with my replacement unit, I can hear the hard drive spinning, which is slightly annoying.
Anyway, I proceeded to restore from a time machine backup and test my replacement unit when I noticed that it would occasionally get the hard drive click + beep + freeze issue that many others who have the 7200 RPM drive seem to be facing. It's extremely annoying, and more importantly I miss the complete silence of my older unit.
My question is, while I'm still in possession of both units(which both have the exact same specs, same 7200 RPM drive, etc.), should I simply just open both up and take the silent(good) hard drive from my old unit and put it into my new one?
The click+beep freeze issue is really pissing me off, and my old unit didn't suffer from it - it's just this replacement one(doesn't make any sense).Anyway, would notice if I switched the hard drive? Would I get screwed somehow? Do they keep track of the hard drive serials or something?
I really don't want to go through the pain of sending this back, especially considering that a LOT of people are suffering from this issue, and I don't want to end up with another defective drive. I'm sick and tired of games and just want a computer that WORKS.
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Jun 5, 2008
My parents emac G4 is having a display issue. I gave them this machine when I upgraded. They are lost on it so I am trying to fix it for them.
There are 2 users on the emac.
On the one side the display is perfect.
The other user's display is way too bright. Gray colours look nearly white and I can't see some of the icons in Mail. It looks like it is being lit up extra bright from the back.
The administrator of the computer side is fine. Colours are perfect.
I've gone into System Preferences and worked with the display stuff in there. Contrast/Brightness etc. Nothing.
I would think nothing is wrong with the display since the administrator side is fine. I've changed the gamma stuff and still nothing.
When I go into the Finder on the non-administrator side I cannot access the Colour Sync Utility. I can only do that on the Administrator side, which I did but the changes did not apply to the other side.
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Aug 12, 2010
im having strange display issues with my powermac g5 its constantly flashing an refreshing the display every now and then after it wakes from sleep. similar to the way it would refresh if you change the screen res.
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Apr 16, 2008
This morning my girlfriend booted up the MP and it froze when she tried to log on. A short time after freezing she was able to bring up the Dashboard but then the computer display went wild flashing like a strobe light. Ever heard of this?
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Jan 4, 2010
Under Windows 7, if I go to the following URL, I see a MAJOR problem:
[URL]
There is something like 256 distinct shades in each horizontal bar. NOTHING MORE.
If I simply drag my web browser over to my second monitor, a 28" 1920x1200 monitor hooked to the mini displayport, it displays PERFECT gradients.
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Jun 25, 2012
When I try to open my MacBook Pro a flashing file with a question mark.
Info:
MacBook Pro, Mac OS X (10.6.8)
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Mar 20, 2009
I can't explain it, except that once in a while, perhaps once a day, I get a very slight flicker from my LED Display when connected to my MacBook Pro. It's not a colour shift like some others have reported, but rather literally a quick flicker like the screen loses power for a sec but only for literally a millisecond...
Don't suppose anyone else has noticed this? It's not even really an "issue" in terms of using the screen, but just a bit odd, and hopefully not a sign that it will crap out down the line.
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Feb 25, 2012
I have tried to migrate hardrive content from the emac to our imac with no luck. We still need to get eveything off the emac. What is the best way to do this? Take the hard drive out and then what?
We have a macbook in the same situation if you can answer that one too.
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Nov 20, 2007
I turned on my G5 for the 1st time and the only thing that shows on the monitor is a small folder in the center of the screen with a question mark "?" in the middle alternating back and forth with the Mac icon every couple seconds. There is no indication the keyboard or mouse are able to function although both are hooked up properly.
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Feb 25, 2008
In the last 5 days I've started noticing a strange flickering with images loading in Safari both static and in-line video e.g. cnn.com. A few days ago at lunch while home I opened both Safari and Firefox, opened cnn.com and then clicked on a video. With both videos playing at the same time it looked fine in Firefox but flickered in Safari. I've noticed the same issue with static image loads too. In FF the image loads no problem, in Safari it flickers. I don't think this is related to the video card (8800GT) but sounds like a software issue to me.
Anyone else having a similar problem? BTW, I'm running 10.5.2 with all the latest updates. I've subsequently noticed that turning the machine off and on again relieves the problem?
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Apr 5, 2012
Can anyone explain why, when i first open safari and double click to open a new tab, just before the Top Sites page loads i get a flicker of a partly scrambled image? This image is usually, but not always, of a site or screen that has just previously been open in the display, sometimes from a webpage, sometimes from a window such as system preferences. Occasionally the scrambled image is nothing that has been on my screen in the last 24hrs, as far as i can remember. This isn't a problem, per se, but a funny quirk that makes me wonder if there is something amiss with my Macbook. How is this image left hanging around to then briefly re-appear in a scrambled format?
Info:
MacBook, Mac OS X (10.6.8)
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Jun 2, 2014
I have having ongoing trouble with green frames in the export. I have read it could be a rendering problem, however i do not see it when playback in the time line, ONLY when after I complete the edit.
Info:
OS X Mavericks (10.9.2)
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Feb 7, 2007
I have a 1.2 Ghz Power PC Ibook that has been a flawless laptop for almost two years now. Yesterday, I noticed that the screen wold periodically dim/brighten every couple of seconds. As I looked at the battery icon, I noticed that each time it dimmed, the charge icon would switch to a battery (as if the laptop wasn't plugged in), and each time it brightened, the corresponding charge icon would appear.
This happens even though it is plugged in, and usually, if I adjust the power cord, then it stops. But each time I have had to do this, it becomes less responsive to the method! Now I'm afraid my computer will simply die a slow death, with me frantically jiggling a cord to no avail, watching as it breathes its last breath, unable to be repowered!
PS: I'm an American, in Germany, who will be in London next week and able to visit a genius bar there...but I'm not positive that my warrranty extends beyond American borders.
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Apr 22, 2010
I'm experiencing flickering on my imac when playing videos on the apple help videos:
[URL]
there is tearing at the top of the video but works fine on my windows pc .
All latest updates have been installed and other videos play fine...only apple site.
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