emelvy wrote: > On Apr 1, 11:38 am, Dan <[email protected]> wrote: > >> At 1:36 PM -0700 3/31/2009, emelvy wrote: >> >> >>> Followup on this query. No one responded and I've had no success >>> >> You fell into the googlehole. I never received your original. >> > > Strange -- I did receive my copy the day after I posted. > > >>> On Mar 23, 11:19 pm, emelvy <[email protected]> wrote: >>> >>>> My 1 GHz eMac froze today and can't be restarted -- every time I >>>> restart, it shows a kernel panic almost immediately (no startup >>>> sounds). The top of the screen reads: >>>> <panic (ch 0): Unable to find driver for this platform: "PowerMac >>>> 4,4"> >>>> >>>> It sounds like a hardware problem. >>>> > . . . > > >> Pull all the memory then try booting - see if you get a beep sound. >> The normal bong indicates it completed its self-test. Lack of noise >> indicates a total self-test failure, or its inability to even run it. >> Removing the memory should make the self-test do one beep, to >> indicate there is no memory. That will tell us how much life is >> there. >> >> It's possible that the Backup Battery has died, or perhaps the power >> supply or... >> > > I found a week ago that the battery was down to less than a volt. > I replaced it with a new one, but that didn't prevent the kernel > panic > on every startup. > > >>> bought a new 24" iMac Core 2 Duo to replace it. >>> >> Nice! >> >> > . . . > >> - Dan. >> -- >> - Psychoceramic Emeritus; South Jersey, USA, Earth >> > > Thanks, Dan, for your suggestion of removing all the RAM to see > if the eMac reacted properly on boot up. It did give one long beep, > as it should have if the hardware was not dead. This was > encouraging. > > So I put back the RAM cards and started up from the TechTool Deluxe > boot CD that I got when I bought AppleCare (now long expired) for > this > machine by holding down the C key during start up. > > [You might ask, "How did I get that CD into the eMac's closed tray?" > Fortunately I remembered that holding the mouse button on startup > will open the CD drive's tray, a very useful trick indeed!] > > The machine booted up successfully from this CD and all the TTD tests > ran correctly -- there is apparently nothing wrong with the > hardware. > > Next I booted up with my CD copy of DiskWarrior 4.1.1. I bought this > long ago just in case I would need it some day. (Thanks to johnwd5 > for his private email reminding me to try DW.) Again, the bootup > went well, so I told DW to rebuild the directory for the hard drive. > Right away DW told me the Volume Wrapper was faulty and it could > not proceed unless I gave permission to repair, which of course I > did. > > The directory rebuild then proceeded to completion. I got a list of > many minor problems which DW had fixed, plus one major problem: > there was no System Folder. Aha! [I had thought that the immediate > kernel panic I had been getting indicated that there must be some > serious hardware fault, but today I discovered that "Mastering Mac OS > X", > 3rd ed., p794, says "A kernel panic immediately after startup can > also > suggest that important system files are corrupt or missing."] > > So now I knew what was really giving the kernel panic, although I > don't > know what brought it on. Next step was to boot up with a > Mac OS X Install DVD. It worked, and both the eMac and I are happy! > I withdraw my offer to give away this eMac, as I can substitute it > for > an old 6100 that I need to use occasionally. > > emelvy > > > This is a great success story. Wonderful. We should perhaps have an area in the forum where we could turn posts like these into texts doc and put them up there with appropriate titles. So people can browse and use.
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