Mac Pro :: Freezes - Monitor Fills With Little Wavy Lines
Apr 5, 2012
My MacPro (early 2008, Lion, software up to date, Disk Utilities) freezes suddenly, colours become distorted and the screen fills with little wavy lines, a bit like horizontal curly brackets. The Magic Trackpad and Bluetooth Keyboard are unable to control anything. Working in Safe Mode is possible, but the problem sometimes appears even then.
Thu Apr 5 11:27:51 2012
panic(cpu 2 caller 0xffffff7f808f8907): NVRM[0/2:0:0]: Read Error 0x00003250: CFG 0x00000010 0x00000000 0x092880a2, BAR0 0x92000000 0xffffff812b8dd000 0x092880a2, D0, P1/2
Backtrace (CPU 2), Frame : Return Address
0xffffff812b0bb2a0 : 0xffffff8000220702
0xffffff812b0bb320 : 0xffffff7f808f8907
0xffffff812b0bb3b0 : 0xffffff7f80c64c76 .....
Info:
Mac Pro (Early 2008), Mac OS X (10.7.3)
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Mar 30, 2009
I'm looking for some information and possible repair tips for my cousins iMac G5 (First Gen) 1989. I don't know anything about mac's, I've always been a PC user. But, I recently fixed both my aunt's laptop and desktop (both pc), so my cousin asked if I would take a look at her mac, as well. Basically, when the iMac is turned on, the screen goes weird. It fills with a bunch of lines (both horizontal and vertical), some spanning the entire length of the screen, and some being only about half an inch long. The lines don't stay stable, they flicker and change positions every few seconds. Behind the lines, you can see the black screen with the apple on it.
It doesn't seem to get past this point though, it seems to freeze and never leave the apple screen, although the flickering lines continue to change. I tried jiggling and moving the power cord around, and whenever I moved it the lines on the screen seemed to change positions. I also tried taking hold of the sides of the monitor (machine? I have no idea what mac-speak for anything is) and very gently pressing and "twisting", and this changed the lines as well, at one point it turned to all vertical lines spanning the entire length of the screen. We opened it up to see if any wires were loose inside or anything, but there really weren't any exposed wires that I could see that I could even try to tighten/adjust. Right now it's not even usable.
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Nov 5, 2008
I have a 20'' iMac with a 2.4GHz Core 2 and an HD2600XT.
There are light vertical wavy floating lines visible on the screen when running Windows XP. They are more clearly seen when you look the screen at an angle, from down below you look upwards to the screen. The floating lines can be precisely seen on grey backgrounds. These lines are not noticable much, but when you closely look with grey backgrounds, they are visible.
The problem is very strange because I've tried updating the drivers to my HD2600XT, and no luck at all.
I'm not able to determine wether the problem is hardware of software related, due to the problem not existing in Mac OS X.
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Apr 10, 2010
My computer (24" 3.06Ghz intel core 2 duo) won't start. When I try to turn on or restart my iMac I get vertical rows of pixelated lines across my monitor on the white startup background with the apple logo and it will either freeze up or the background turns gray and I get a message that says I should restart my computer. This has also happened when restarting using the Apple hardware test (which doesn't report any errors).
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Jun 9, 2009
I opened my MacBook Pro (santa rosa, I believe - bought it about two years ago) and the screen froze with some strange banding/patterns across it. I tried rebooting, and after 10 - 20 seconds of the apple icon loading screen, the same thing happens - the screen jams and crazy lines appear. I'm guessing at a problem with the video card...
I've followed all the steps outlined in the comment by Collin here [URL]
1. hold down Command Option P and R buttons for 3 chimes
2. Shutdown MacBookPro, remove power adaptor, remove battery and then hold the power on button down for 5 secs. Refit battery connect power adaptor and boot up.
3. find DVD that came with MacBookPro and press the power button and immediately insert the DVD and once it goes in Hold the D key down.
Step 3 throws the 'you need to restart' error screen, the others just lead to the same corrupted screen as before.
Does anyone have any suggestions or insights in to this problem?
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Aug 8, 2010
iMac Flat-Panel G4 1GHz, 1.25GB Memory, Built 2003, OS 10.4.11: the 17" flat-panel display has developed vibrating vertical red lines. I have saved an iMac G5 that died; can I use it just as a monitor for my G4?
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Nov 10, 2008
i got my imac this june, so i'm not sure what generation that makes it. (somone let me know plz) anyway just today i noticed I have some horizontal lines going across it. very faint and hard to notice, but i'm anal and i noticed them. My first instinct was to find out how to degauss this monitor.
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Aug 7, 2010
I have an Apple iMac 20" 2.16 GHz Intel Core 2 Duo. I work on photos in Adobe Photoshop CS4. Am running Snow Leopard 10.6.4. Am getting thin horizontal lines across the surface of the monitor. Reduced the resolution of the monitor from 1680 x 1050 to 1344 x 840. For a while, it was better but the lines are back again. Any idea what is causing this problem? Is it software, a setting on the computer or maybe a problem with the video card? Hope it is not a bad video card.
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Nov 25, 2009
It started on one side and has gotten worst to the point of filling the screen with hundreds of lines. Can hardly see screen. Now theres a big black lined rectangular shaped box on the center right screen... Would like to plug in another monitor and see if I can operate this G 5 off another monitor.
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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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Feb 27, 2007
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Apr 18, 2010
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Feb 18, 2009
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May 16, 2012
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Info:
MacBook Pro, Mac OS X (10.7.4)
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May 21, 2012
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i downloaded grandperspective and found this sparsebundle file of incredible 418Gb size made of many many numbered files of 8,4MB each fromca 10 different dates since i have the mac.Â
i am new to mac and an old dos user therefore i do not know how this bundle is designed or if i can delete files of this band folder. i googled that this file is from FileVault and therefore reconstructed everytime i log out. i do at times hard reset the mac(5secs power button) when its not as fast as i want or blocked by too great 3d files i work onold dos habit. could these be leftovers?
please please help me with this issue since i have to work and like that the beautiful mac doesnt even open up websites..
Info:
PowerBook, Mac OS X (10.7.4), sparsebundle size FileVault delete
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My wife's bluetooth just disappeared. The Bluetooth symbol on the menu bar is gray with a wavy line. Ran out and got a bluetooth adapter and it still isn't recognized. Bluetooth was working great last night. Not sure what my wife did.Â
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iMac, Mac OS X (10.6.7)
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Dec 7, 2014
After having had communication problems abroad using a 3G key Internet connection ( bad signal, jumping back to 2G, aborting connection suddenly, ...) I receive now systematicaly a copy of a mail I sent, one day before, to someone else, in a mailbox "recovered messages" (this is however my translation of the french name of the mailbox: ( "Messages récupérés - IMAP"). Deleting this message does'nt cure the problem: the message comes again (I do'nt know from where) and again. How to stop this reoccurant mail?
(Macbook Pro Retina, Yosemite 10.10.1, Mail Version 8.1)
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I have a newer iMac 24" bought in 11/2007. I have the mini-dvi to vga converter and when I connect it to a external tv capable of 1024x768, the iMac freezes and does nothing. I disconnect and the screen turns blue and the flickers back on and everything works. I have made the connection then booted up, and I have tried every resolution all the way down to 640x480, same thing it just locks up the screen, but again as soon as I unplug the mini-dvi to vga cable from the iMac it flicks to a blue screen and everything comes back. I have reviewed dmesg nothing, and revieiw /var/log/messages. Is there any troubleshooting I can do. I am old school unix/linux guy just converted my family to Apple and would like to use the display on my tv to watch my iTunes movies.
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I have a G4 powerbook with an LCD that only displays the top 25% of the screen. I've been using an external monitor with it just fine. Today, I reinstalled the OS and ran into a problem. The main OSX startup menu (you know, where it asks for your location, timezone, personal info, etc) is prompting me for information, and I can't see the forms to fill them in! The external monitor defaults to "extended" as opposed to "mirrored", and the forms are embedded, meaning I can't drag them over to my external monitor. Obviously, if I can't fill out these forms and get to the desktop, the laptop is completely useless.
Does anyone know how to force the external monitor to be "mirrored" from startup? Is there a keycommand?
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The only solution at the moment is to press the turn off button for a few seconds then switch the laptop on again. It will then work normally until for no apparent reason this happens again.
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Jul 12, 2009
I have a macbook pro from 2007, and I just popped into a tagsale and picked up one 2001 Mac Studio Monitor and a 2001 Fomac Gallery monitor.. So I was hoping to use the monitors with my laptop because the small screen on this laptop is KILLING me, and i'm not yet prepared (financially) to get a powermac.. Paid $10 for both of them..
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Information:
G5 Quad
Mac OS X (10.5.1)
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