Mac Pro :: Screen Flashing And Freezing?
Apr 6, 2012
I have a 2008 Mac Pro, which has served me well since I got it, at least until a day or two ago. At that time, it started exhibiting sporadic black flickering on screen, paired with freezing. At first, everything would freeze except the audio, which would continue playing uninterrupted, and after a minute or so the system would unfreeze like nothing happened. Now, though, it seems to have gotten worse; the system doesn't seem to recover after a flickering episode, and even the audio will get stuck into a one second loop after a while.
I tried resetting the PRAM and the SMC. When that didn't work, I tried restarting into Lion Recovery mode with Command-R. For some reason, that sent me right to a reinstall screen, but it didn't matter, because the screen started flickering and the system froze almost immediately after startup. I'm pretty sure that what it froze in was a separate recovery partition, so that should rule out any software issue. I'm guessing that my video card is fried, but I'd like to see what others think; I'd like to avoid buying a video card that I don't need.
Info:
Mac Pro (Early 2008), Mac OS X (10.7.2), GeForce 8800GT, 6GB RAM
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May 26, 2012
My mac mini is freezing with flashing question mark.
Info:
Mac mini (Late 2009), Mac OS X (10.7.2)
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Jun 21, 2012
This is unnerving. At random intervals, my screen flashes. It more like "winks" - as though a screen capture was being made. Actually, when you make a real screen capture, the screen doesn't wink, but that's the impression I get. The screen doesn't flicker or flash like it's a hardware bad connection, but goes through a fast, but continuous normal-white-normal cycle. I'm looking at my activity monitor to see if something is unusual, but I can't tell. Everything I look up seems to be real.
Info:
MacBook Pro, Mac OS X (10.6)
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May 20, 2009
before I went to bed, I was playing the Sims 2, when my iBook G4 crashed. Our power cord can be a bit dodgy, so sometimes that happens. I didn't really think about it much, just closed the laptop and went to sleep.Last Monday morning, I opened it and pressed the power button. It began turning on, and got as far as the grey screen with the apple and the spinning circle. And then it just froze. The circle stopped turning.
I freaked out a bit, and restarted it a bunch of times, each time with the same result. (One time it stopped spinning, and then told me a restart was required. Huh. The rest of the times the exact same thing happened though.) I even tried unplugging and removing the battery, but it made no difference. So eventually I just shut it and decided to try again later.Last Tuesday I opened it and pressed the power button without much hope, and again the apple and circle came up just fine, then stopped, but then a bunch of words and numbers popped up.I'm a complete computer noob, but they don't look good to me... or are they good?
Kernel version:
Darwin Kernel Version 7.9.0:
Wed Mar 30 20:11:17 PST 2005; root:xnu/xnu-517.12.7.obj~1/REEASE_PPC
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Oct 11, 2009
I don't know what else to do... Started sounding like a cd was running o something when nothing was in there, now that stopped, but im just getting a white screen with a flashing folder with a ? Its flashing between the finder icon and a ? and will not do anything else.
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Apr 19, 2012
My screen starts to flash when my macbook Pro is on for a period of time. Does this mean it is going to die? Does the battery need to be replaced? Is the video processor going out?
Info:
Mac Pro, Mac OS X (10.6.8)
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Jun 11, 2010
My screen periodically starts flashing and getting huge white lines that run down the screen when I play games (only have crysis maximum edition) but then it stops and goes back to normal. Ive noticed that it doesnt happen all the time, and not at certain moments in the game (i.e. happens at one point but doesnt happen again at that same point a different time) and it will stop if i go and look only at a wall. Is this normal or is my MBP F'd?
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Sep 3, 2014
When I turn my MacBook Pro on, the colorful pinwheel shows up and then the screen flashes white and goes back and forth from my screen saver to the white screen andI can't get it to stop.
Info:
MacBook Pro, OS X Mavericks (10.9.4)
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Jun 29, 2009
2.0GHz MacBook running 10.5. My friend's computer which he brought to me thinking I might be able to get it booted.
My buddy went to bed last night, running a video on his hard drive with the computer hooked up to his flat screen TV, he fell asleep while it was playing. This morning he woke up to a frozen screen. He did a manual shutdown. Upon restart he got a gray screen with nothing showing.
I have tried the original installation disk and restart while holding down "C" with no result.
I tried a copy of Tech Tools 5 in the DVD drive... with no result.
I have tried booting off of my own external firewire HD upon which I keep a bootable clone of os10.4.11... with no result.
I tried booting off that same external HD while holding down "C" and got the flashing folder with question mark.
I tried using a firewire cable and starting the bad macbook in target mode while hooked up to my old iBook. This caused the macbook screen to show a firewire symbol and nothing showed up on my iBook screen but an archive... Tech Tools on my iBook recognized the archive but could not Unmount the archive when I tried to use any of the tools to explore or fix the target disk.
I know that the flashing question mark indicates there is no start up software to be found, but I have to question whether this might not be something more than a bad HD. Anyone have any suggestions?
BTW... the macbook is out of warranty. My friend just went ahead and ordered a new macbook pro so there is no pressing need to get this fixed in a hurry, but he would like to get the old computer fixed if it is just a matter of replacing an HD.
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Oct 11, 2010
I am currently stuck on the grey screen of death with the flashing ? file folder.I have tried resetting the pram etc. and when i boot from my snow leopard disk the disk utility does not recognize my HD. Is there anything else I can do to fix this? Or try?
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Nov 27, 2010
I received my computer back from them yesterday, but when i opened it it was COVERED in packing material? (Thats what they said anyway). After talking to them they said they would cover my laptop for 90 days from water damage or Accidental damage! Only problem is, my computer screen flashes black randomly.. Anyone have any experience with it? So far they replaced the screen and the logic board...
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Mar 13, 2008
Well, a friend of mine spilled wine on my ibook g4. Other than trying to decide how much if not all of it to ask her to pay(my wine, but on an armrest and I was in the other room), I was wondering if anyone can fix suggestions. We got the battery out and it unplugged right away, but when I turn it on the screen violently flashes on and off. It does seem to run fine other than that, though.
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Aug 18, 2008
When shutting down, we get a familiar light blue screen before the computer turns off. I'm getting this flashing at me while operating my MBP. It seems to happen twice, every so often. The screen will turn blue and become empty simultaneously for about a half second - then the screen I'm expecting to see comes back for about half a second - and then the light blue screen comes back again for about a half a second, and then everything goes back to normal.What the heck is this?
I must say, I'm having a little bit of a difficult time with my switch to Apple from Microsoft last November. I've already had to replace the logic board, it appears as if my network card is no longer working (I can only connect via WiFi) - and now I'm having this odd light-blue screen flashing... My video card?
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Aug 8, 2009
I have an iMac 2.8 24 inch, about Two years old running 10.5.7 , when I start the computer it shows the normal Gray screen for about 30 seconds, then the screen goes all Black , but with a small flashing white line ( _ ) in the top Left hand side corner.
It just stays all Black for ever , I then hold down the On / Off button and turn off the computer, I then hold down the keyboard '' option key '' and press the on button at the same time , then I get the option to start from the main HDD , I click the Icon and the computer then starts normally , and every thing runs ok.
Can some one please tell me what I have to do to get my iMac to start up normally again , Ive run Repair Disk permissions but the problem still occurs . Over the last few day's Ive been trying out a few new applications, so not too sure if this has any thing to do with this current problem
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Dec 4, 2009
I've recently been getting a flashing planet or globe when I first boot my mac. Nothing is different as such, I'm just curious what it means.
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Aug 9, 2009
I was wondering if anyone might know anything about the pink flashing columns i'm experiencing on my iMac screen. at first, there was one column on the screen with pink stripes... the second time it continued the same, and the third time, another column of pink stripes opened up and it really started distorting the image on the desktop, moving up and down uncontrollably.
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Mar 28, 2012
each time there is an alert or my macbook ask me a question or a kind of confirmation my screen is flashing once. Someone to know how to disable it?
Info:
iPhone 4, Mac OS X (10.6.8), iphone 4.3.5 and itunes 10.4 (80)
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Jul 6, 2012
When I log on to my Mac I get a white screen with a flashing folder showing a? What is wrong with it and what can I do.
Info:
iMac
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Jun 23, 2014
AT start up, after entering my password, there is a flashing grey screen, and I cannot use my laptop.
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Sep 4, 2009
I teach in a computer lab with 30 Duo Core iMacs running 10.5.4. Occasionally I will have a screen that begins flashing off and on. The computer should have gone to the screen saver.
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Mar 9, 2012
I have a MacBook Model # A1181, I'm getting a grey screen with a flashing question mark inside a folder and the drive doesn't work ither....
Info:
SAFARI download, Mac OS X (10.5.8)
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Mar 12, 2012
I was given a MacBook 13" laptop, new to apple computers though. At first I was told the laptop itself did not power on. I charged it overnight, and it will come on, however, only to a white screen with a file folder in the middle with a ? mark in the file folder. I googled the screen and got several choices, start in save mode, did nothing. I called apple, since it is a 2006 model computer, it is of course out of support, but she emailed me articles to follow directions. None of them did anything, since it was given to me I do not have the start up disks, just the laptop and the charger. I did notice that out of all the steps the only thing that did anything different was the "reset NVRAM/PRAM" it made speakers make a sound as it was starting up. Thats all it just still went to white screen and file folder.
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Apr 9, 2012
My computer seemed locked up, nothing would open. I had to force quiy everthing. I tried to normally shut it down and it wouldnt shut down. I held the on off power switch. When I tried to turn it back on It stays tuck on the white screen with a flashing folder icon with a question mark in it . Has my hard drive gone bad?
Info:
iMac (24-inch Mid 2007), Mac OS X (10.6.8)
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Apr 14, 2012
My MacBook pro 15" from mid 2011 sometimes has a flashing screen and then freezes up.
Info:
MacBook Pro (15-inch Early 2011)
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Apr 17, 2012
Mac book air has a flashing question mark. How do I reset computer?
Info:
MacBook Air, iOS 5.1
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May 9, 2012
I can't turn on my computer. The screen has a flashing question mark.
Info:
MacBook Pro (13-inch Mid 2010), iOS 5.0.1
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May 25, 2012
I have not been able to startup my iMac for 3 days. When I turn it on all I get it is a white screen. After about 10 minutes a folder with Question mark inside apears in the middle of the screen and it just stays like this. I unplugged everything from the computer except for the mouse and keyboard. I had this computer since 2008 and never had a problem until now.Please help
Info:
IMAC 24 2.8, Mac OS X (10.5.2), 2 GB RAM
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Jun 6, 2012
We did the most recent update that Apple produced and our iMac has yet to turn back on properly. We get a white screen with a flashing grey folder that has a question mark on it..
Info:
iMac, Mac OS X (10.7.4)
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Jun 15, 2012
I installed several system updates on my 2007 iMac last night, running OS 10.7, and today I can only get a black screen with a flashing white power light when I try to start up. My computer will neither start up nor completely shut down, and my wired keyboard won't communicate either.
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Dec 9, 2014
when I start up my computer, it starts loading and gets about a 1/4 of the way along then stops and brings up a blank screen that is sometimes flashing or just blank
Info:
iMac, OS X Yosemite (10.10.1)
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