[DM-MUG] PowerBook G4 flickers

[John Kisner]

I tried TechTool4 a few weeks ago and it didn't seem to help much.  I assume
it is much like Disk Warrior.

Thanks to Ray for pointing out the disk utility in OSX -- it repaired a lot
of "permissions," so I have my fingers crossed.  If problems persist, I'll
try to be first in line with a repair at the new Apple Store.  :->

John

----- Original Message ----- 
From: "Matt W" <maccelerate@earthlink.net>
To: <dmmug@dmmug.org>
Sent: Tuesday, June 29, 2004 10:09 PM
Subject: Re: [DM-MUG] PowerBook G4 flickers


> It could be due for some maintenance, especially if you haven't done
> any recently. Ray's on the right track. I also prefer Disk Warrior.
> Good price, great product.
>
> I would suspect the inverter board for the flickering. Kernel panics
> are Mac OS X crashes. They should be rare to nonexistent on a proper
> install with Mac OS 10.3.2 and newer. Frequently related to hardware
> problems, software CAN cause them too. I have created a few by plugging
> FireWire drives in at bad times (while other FW drives are copying
> data, for example) but mostly on older versions of Mac OS X. If you are
> talking about apps quitting, not kernel panics, that's a little
> different and software is probably to blame. No solid tricks here, just
> a lot of permissions checking, update installing, extension and plist
> (Mac OS X preferences) testing.
>
> Matthew
>
> On Jun 29, 2004, at 6:20 PM, Ray Bowler wrote:
>
> > At 12:36 PM -0500 on 6/29/04, John Kisner wrote about [DM-MUG]
> > PowerBook G4 flickers:
> >> I have a PowerBook G4.  It's several years old (667 Mhz).  The screen
> >> flickers once in awhile, and I have more crashes than I would expect
> >> with Panther-- but maybe those are MS Word related (which I don't
> >> often use, but have recently to do some edits).  Today I had a new
> >> one: in the midst of browsing web (on Safari) the screen got darker
> >> and I got a message in many languages to hit the power button and
> >> restart.
> >>
> >
> > I have no help on the screen flickering.
> >
> > The increasing number of crashes indicates some other things may be
> > wrong. The black screen is a kernel panic. A first step to dealing
> > with this is to either startup from a different disc and then run
> > diskutility to repair your disk. If you don't want to do it this way
> > then reboot holding the command key and the s key. It will start up in
> > single-user mode with a black screen. When it finishes you will be a a
> > command prompt. Above it will be some instructions about running fsck.
> > Type in fsck -y and press enter. This will run the same repairs that
> > diskutility does. If when it finishes it says it found problems then
> > run it again until there are no problems. type "reboot" to start up
> > again. When it reboots go to the diskutility in utilities and start it
> > run "repair permissions". These are starting places. If you still have
> > kernel panics or a lot of crashes then more can be done.
> > -- 
> > Ray
> >
> > Des Moines, IA Mac Users Group
> > Fourth Tues of the month.
> > See
> >
> >    <WWW.DMMUG.ORG>
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