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Late 2006 iMac, Lines, Kernel Panic, Freeze, Reboot, Restart, Serial W8 ?

116109 Views 388 Replies Latest reply: Oct 11, 2013 8:39 AM by michaelant RSS Branched to a new discussion.
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GaBeech Level 1 Level 1 (0 points)
Currently Being Moderated
May 26, 2010 8:36 PM
Hello,

Let me start by explaining the method I am initially going to adopt in my search for answers;

•All of the keywords and more that would not fit in the title space, relate to my problem.
•I think the *iMac Serial* holds the key to mine and possibly a lot of other peoples search for answers.
•My second post will explain what I know about the Serial and the information it provides.
•I have a strong feeling that a lot of people who have the same or similar problems to me will have a Serial that begins with at least W8.
•I believe that a lot of affected machines will of been produced between 2006 & 2008, yet not confined to that window in time.
•So, to round up, I am looking for people who have had/are having the same/similar problems to the ones listed below.

•Small graphical glitches; Thin lines in random areas on the desktop, growing in number and intensity over time.
•Graphical glitches on, in and around Finder windows. Again, growing in number and intensity over time.
•Horizontal lines across entire screen. Again, growing in number and intensity over time.
•The odd Software Crash/System Freeze. (Which does not happen very often on the iMac we've grown to love)
•More frequent Software Crashes/System Freeze's. (Maybe it's all that freeware and plugins I've been playing with)
•Kernel Panic's, never had one before... it was a new one on me.
•Frequent Kernel Panics.
•System Freeze, recovering after being put to sleep and then woken.
•System Freeze, unrecoverable. Hard reset required.
•Exactly the same behavior after a full reinstall of OSX.
•Exactly the same behavior after wiping system drive with zero's, then a full reinstall of OSX.
•Exactly the same behavior after wiping system drive with zero's, then a full reinstall with a previous version of OSX.
•System Freeze requiring hard reset on nearly every occasion Time Machine was accessed.
•Shut iMac down completely, never to respond to Power Button being pressed again, even after trying to reset the SMC.


The above is a simplified list of key events on a relatively short journey from Perfect Machine to, 'will not power up'.


If you or anyone you know has gone through anything similar, I would love you to join this topic.

Yours,
GaBeech
iMac (20-inch Late 2006) 2.16 GHz Intel Core 2 Duo ~ x1600 Graphics, Mac OS X (10.6.3), Serial Number: W87070ACVUV (Check My Biography To See What A Serial Means)
  • rkaufmann87 Level 8 Level 8 (40,620 points)
    My late 2007 24" iMac serial number begins with W8.

    The machine operates perfectly.
    iMac and Macbook Pro, Mac OS X (10.6.3), iPhone 3GS Airport Extreme Airport Express
  • den.thed Level 7 Level 7 (23,390 points)
    My W8602..... also operates perfectly.
    17" Early Core Duo - 320GB WD Caviar Blue HDD - 2GB RAM - 21.5 LG Display -, Mac OS X (10.6.3), - Maxtor FireWire HD's - WD Passport - Nikon - Epson - 80GB Classic - iPad
  • Moloch\' Calculating status...
    Serial : W86463, glitches & artefacts on screen depends on GPU temperature.
    iMac 24" 2006.
    Imac 24 2.16 (6,1) Mac OS X (10.5.8) NVIDIA GeForce 7300 GT / 3GB Ram, Mac OS X (10.5.8)
  • R C-R Level 6 Level 6 (13,835 points)
    GaBeech wrote:
    I don't believe any information in a *Serial Code* could jeopardize a users security in any fashion, it could be compared to a serial on a television or a box of crisps.


    The serial number uniquely identifies the Mac. With it, anyone can call Apple & pose as its owner, reregister it under their name, claim it was stolen from them, etc.

    It is a very bad idea to post it in the clear in any public forum.
    2008 iMacs: 24"/3.06 GHz + 20"/2.66 GHz; White MacBook/2.4 GHz, Mac OS X (10.6.3), Kensington Trackball; Airport Extreme 802.11n; assorted iPods and older Macs
  • R C-R Level 6 Level 6 (13,835 points)
    GaBeech:

    The symptoms you report are consistent with a failure in the video memory (VRAM) subsystem. This could be anything from a few cells going bad in a VRAM chip to a failing associated part like a capacitor that conditions a signal or power line.

    Such failures frequently are gradual, at first only occasionally causing visual artifacts but eventually getting bad enough to cause crashes, kernel panics, etc. When they reach this point, they almost always can be detected by the Apple Hardware Test (AHT) provided with your Mac (on one of the grey system discs that came with it & on some models on a hidden partition of the hard drive).

    Running AHT should produce a code indicating the failure. It would be useful to know if that happens with your Mac & if so, what the code is.
    2008 iMacs: 24"/3.06 GHz + 20"/2.66 GHz; White MacBook/2.4 GHz, Mac OS X (10.6.3), Kensington Trackball; Airport Extreme 802.11n; assorted iPods and older Macs
  • rkaufmann87 Level 8 Level 8 (40,620 points)
    I have to agree with R-C-R on this one, posting your serial number in a public forum is short sighted and foolish.
    iMac and Macbook Pro, Mac OS X (10.6.3), iPhone 3GS Airport Extreme Airport Express
  • R C-R Level 6 Level 6 (13,835 points)
    GaBeech wrote:
    If that's all it takes to trick the authorities to believe you, then I may of gone a little far asking people to quote their full serial …


    It isn't necessarily all it takes, but it can complicate your life if the ownership of your Mac is disputed or if that info is used in combination with other things to get access to personal info about you. (I won't go into details for what I hope are obvious reasons, but never underestimate the power of a clever con & the good intentions of honest people to compromise your security.)

    … is there a way of editing previous posts.


    Level two & above Discussions users can report posts to the moderators, suggesting (among other things) that a post needs an edit. When users just post their serial numbers or the UUID of their Macs, the moderators usually obscure some critical part of that. I did report your post, but you have included the serial number in so many places that they probably can't do anything so simple.

    I suggest that you change your user profile info to obscure everything after the first five characters of your serial number ASAP, & if you are concerned about the post here that reveals it, that you post those concerns in the Apple - Support - Discussions - Feedback about Discussions category.
    2008 iMacs: 24"/3.06 GHz + 20"/2.66 GHz; White MacBook/2.4 GHz, Mac OS X (10.6.3), Kensington Trackball; Airport Extreme 802.11n; assorted iPods and older Macs
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