Random lines around screen and then cannot restart computer

I'm having an issue with my iMac. recently i i will turn it on and after a while there will be random lines across my screen in certain windows. when I move the windows around the line moves with the window. as i open other apps i start getting other random lines in other parts of the screen. after a little while longer there is so much random pixels all over the screen that I cant work anymore. at this point hte computer is basically stuck and I cannt do anything. I will then hold the power button down to turn off the computer. when i turn it back on I get the black screen of death which says I have to turn the computer off and turn it back n. if i keep turning it off and on it wont start and give me the same screen. if i wait a couple of hours and start it back up it will first give me the screen again. the second time it will start and tell me that mac unexpectedly shut down. at first the technicians told me that I should reformat the hard drive and I did that. is still have the same problem. does anyone have any idea what this could be?

If the message you're getting is in several languages, that's a kernel panic. Kernel panics are usually, but not always, caused by hardware, with memory a leading cause. If you have a mid-2010 mini, you can easily reseat the memory (remove and reinstall) .... mini's prior to that are a bit more involved to open the case.
See this FAQ on resolving kernel panics.

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    0xffffff81869435b0 : 0xffffff7f8ccebb2e
    0xffffff8186943600 : 0xffffff7f8cd61b4f
    0xffffff8186943780 : 0xffffff7f8cd5d818
    0xffffff8186943870 : 0xffffff7f8cb4566c
    0xffffff81869438f0 : 0xffffff7f8ca77f03
    0xffffff81869439a0 : 0xffffff7f8ca7cfad
    0xffffff8186943a60 : 0xffffff7f8caa59ef
    0xffffff8186943c60 : 0xffffff7f8caa75a1
    0xffffff8186943d50 : 0xffffff7f8d8727a0
    0xffffff8186943db0 : 0xffffff7f8d86f522
    0xffffff8186943e40 : 0xffffff7f8d859f57
    0xffffff8186943e70 : 0xffffff7f8d8172b7
    0xffffff8186943e90 : 0xffffff7f8d8185ac
    0xffffff8186943ed0 : 0xffffff7f8d815338
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    0xffffff8186943f30 : 0xffffff800c4af4c2
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             com.apple.nvidia.classic.NVDAResmanTesla(8.2.4)[D61B2BB9-4289-318D-9197-5E1E13B 1FF32]@0xffffff7f8ca51000->0xffffff7f8ccb9fff
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                dependency: com.apple.iokit.IONDRVSupport(2.4.1)[D41125CE-69BD-32E7-9B1D-4E83431662DD]@0xff ffff7f8ca41000
                dependency: com.apple.iokit.IOGraphicsFamily(2.4.1)[75D81741-64C1-3941-ADFA-9D6B6C434EE4]@0 xffffff7f8c9fe000
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                dependency: com.apple.nvidia.classic.NVDAResmanTesla(8.2.4)[D61B2BB9-4289-318D-9197-5E1E13B 1FF32]@0xffffff7f8ca51000
                dependency: com.apple.iokit.IOPCIFamily(2.9)[2852ACFE-FD28-3C37-9B39-885201BB8D25]@0xffffff 7f8c6bf000
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                dependency: com.apple.iokit.IOGraphicsFamily(2.4.1)[75D81741-64C1-3941-ADFA-9D6B6C434EE4]@0 xffffff7f8c9fe000
                dependency: com.apple.nvidia.classic.NVDAResmanTesla(8.2.4)[D61B2BB9-4289-318D-9197-5E1E13B 1FF32]@0xffffff7f8ca51000
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    com.apple.nke.applicationfirewall 153
    com.apple.security.quarantine 3
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    com.apple.driver.AppleSMBusController 1.0.12d1
    com.apple.iokit.IOSurface 91.1
    com.apple.nvidia.classic.NVDANV50HalTesla 8.2.4
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    com.apple.iokit.IOBluetoothHostControllerUSBTransport 4.2.7f3
    com.apple.iokit.IOSerialFamily 10.0.7
    com.apple.iokit.IOBluetoothFamily 4.2.7f3
    com.apple.iokit.IOFireWireIP 2.2.6
    com.apple.driver.AppleHDAController 2.6.3f4
    com.apple.iokit.IOHDAFamily 2.6.3f4
    com.apple.iokit.IONDRVSupport 2.4.1
    com.apple.iokit.IOGraphicsFamily 2.4.1
    com.apple.driver.AppleSMC 3.1.8
    com.apple.driver.IOPlatformPluginLegacy 1.0.0
    com.apple.driver.IOPlatformPluginFamily 5.7.1d6
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    com.apple.kext.OSvKernDSPLib 1.14
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    com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.6.7
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    com.apple.iokit.IOATAFamily 2.5.2
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    com.apple.iokit.IOUSBFamily 686.4.1
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    com.apple.iokit.IOACPIFamily 1.4
    com.apple.kec.pthread 1
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  • My i hpone froze and then went to a rainbow colored screen and wont activate, restart

    help my i phone froze and went to a rainbow screen and i cant restart it or reboot it

    If you don't have the the original disk, then there is nothing you can do. Flashing Question mark means that the bootloader cant find an OS. The HD could just be scrambled or it might be fried. Just wait it out until you take it to Apple as they will be your best bet to help you.

  • X6 froze at startup screen and then auto shut off

    Hi everyone,
    Just bought my X6 8Gb two days ago. And I had installed Garmin Mobile XT in it the next day. Everything was fine until I tried to backup my contacts, calendar notes and saved messages from my 6230i using Ovi suite. The phone is able to recognise all of the contacts, calendar notes, and saved messages. However, when I restarted the phone, it stays at the Nokia white startup screen and then shut itself off. The only way around this is to do a hard reset which wipes out everything (Garmin still installed).
    Anyone else had this problem? Thanks!

    Hi,
    To eject the disc press the mouse/trackpad button while turning the machine on.
    I would tentatively say that the HD has gotten corrupted. It is possible that it has failed though.
    Have you tried booting in single user mode and running fsck?
    Hold down the 'Apple' key and 's' while turning the machine on.
    You should see a load of white text and then a 'root#' prompt.
    When this is reached type:
    fsck -fy
    press 'Return'
    If this fails to repair the HD then I would suggest trying it in target disk mode attached to another Mac and run disk utility on it from that.
    If all of these fail the only thing to try next would be to reformat the HD and see if that makes it usable. If it starts reporting errors again I thing the HD is likely knackered.
    Robbie

  • Cannot access to any site with ssl connection and fail to open safari and keychain, unless restart computer and login in with Guest account.

    when Update to 10.7.2 ,I cannot access to any site with ssl connection and fail to open safari and keychain, unless restart computer and login in with Guest account.
    OS:10.7.2
    Macbook Pro 2010-mid 13inch

    I also have the same problem, however if I use Firefox or Opera sites with ssl connection work fine. Still, I can't use Google Chrome (ssl), Safari (ssl), the Mac app store (generally), or the iTunes store (generally). Both the iTunes store, Safari and the app store won't respond, and Chrome displays this error: (net::ERR_TIMED_OUT). The problem persists regardless of what network I'm using. Also, when trying to access the keychain or iCloud, the process will not start (will hang). I didn't have these problems at all before updating to 10.7.2.
    Sometimes rebooting helps, and sometimes not. If the problem disappears by rebooting, then it only lasts a few minutes before it reappears. It is very frustrating, especially since there doesn't seem to be any obvious or consistent way of which to fix it.
    I'm also using a Macbook Pro 13-inch mid 2010.

  • I tried to update my iphone 4 to i07 but it's now just stuck at half way on the loading screen and I cannot get it to do anything

    So like a moron, I made the mistake of finally updating my Iphone 4's OS to the new one that Apple has been bugging the crap out of me about for months now. The problem is, my phone is now stuck on the loading screen and I cannot get it to do *ANYTHING*. It won't connect to my PC, Itunes won't let me get on it without the pin lock being entered on the phone which I CANNOT do because the phone is stuck on the update screen.. and Apple won't talk to me for help because I cannot get them the serial number which I CANNOT do because my phone is stuck on the update screen!
    Is there no way to just take the battery out or something? I looked for screws but they seem to be proprietary (because of course they are, because Apple) How do I force it to get off the update screen?!

    If you open it to take out the battery from the iPhone then you forfeit all service for whatever reason from Apple in the future.
    Have you attempt to connect it to your computer and then restore it from iTunes on your computer?

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