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PB G4 Noisy Fan

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David Kennedy

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Oct 15, 2009, 7:23:38 AM10/15/09
to
My G4 has developed a noisy fan over the past few weeks - not generally
a problem as it only tends to happen if I'm video processing or similar
and I can leave the machine to do that overnight.

But, I wondered, is this a sign that the fan might fail? Should I
replace it before then? Is there any protection built in for if the fan
fails? It does seem like one of those jobs that's not really very nice.

--
David Kennedy

http://www.anindianinexile.com

Jon B

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Oct 15, 2009, 7:37:18 AM10/15/09
to
David Kennedy <davidk...@nospamherethankyou.invalid> wrote:

> My G4 has developed a noisy fan over the past few weeks - not generally
> a problem as it only tends to happen if I'm video processing or similar
> and I can leave the machine to do that overnight.
>
> But, I wondered, is this a sign that the fan might fail?

Sods law mechanicals, it could fail anytime in the next 5mins to 5years.

> Should I
> replace it before then? Is there any protection built in for if the fan
> fails?

The thermal cut out kicks in when the temps go too high.

I'd install TempMonitor it puts the temps in the top bar, you can keep
an eye on if the temps are staying in range. If they start heading up to
the danger area then time to get them swapped. Or if you need the
machine for anything critical in the near future get it swapped now as
you can guess when its going to go.

> It does seem like one of those jobs that's not really very nice.

Yeah it's about a 2hr job for one those
--
Jon B
Above email address IS valid.
<http://www.bramley-computers.co.uk/> Apple Laptop Repairs.

J. J. Lodder

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Oct 15, 2009, 8:13:53 AM10/15/09
to
David Kennedy <davidk...@nospamherethankyou.invalid> wrote:

> My G4 has developed a noisy fan over the past few weeks - not generally
> a problem as it only tends to happen if I'm video processing or similar
> and I can leave the machine to do that overnight.
>
> But, I wondered, is this a sign that the fan might fail? Should I
> replace it before then? Is there any protection built in for if the fan
> fails? It does seem like one of those jobs that's not really very nice.

Begin by cleaning it.
Some fans have open bearings.
A drop of light oil works wonders,

Jan

David Kennedy

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Oct 15, 2009, 9:12:10 AM10/15/09
to
Jon B wrote:
> David Kennedy <davidk...@nospamherethankyou.invalid> wrote:
>
>> My G4 has developed a noisy fan over the past few weeks - not generally
>> a problem as it only tends to happen if I'm video processing or similar
>> and I can leave the machine to do that overnight.
>>
>> But, I wondered, is this a sign that the fan might fail?
>
> Sods law mechanicals, it could fail anytime in the next 5mins to 5years.
>
>> Should I
>> replace it before then? Is there any protection built in for if the fan
>> fails?
>
> The thermal cut out kicks in when the temps go too high.
>

Nice to know.

> I'd install TempMonitor it puts the temps in the top bar, you can keep
> an eye on if the temps are staying in range. If they start heading up to
> the danger area then time to get them swapped. Or if you need the
> machine for anything critical in the near future get it swapped now as
> you can guess when its going to go.
>

Done that, it seems to peak at just under 70 degrees.

>> It does seem like one of those jobs that's not really very nice.
>
> Yeah it's about a 2hr job for one those

Hmmm.

David Kennedy

unread,
Oct 15, 2009, 9:16:15 AM10/15/09
to

I hadn't even thought that it might be accessible without major surgery.
Looking at

<http://www.ifixit.com/Guide/Repair/PowerBook-G4-Aluminum-15-Inch-1-67-GHz-Left-Fan/655/4>

it seems to be almost as much trouble to gain access for a lube job as
it is to replace the little bugger.

Jon B

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Oct 15, 2009, 10:04:39 AM10/15/09
to
David Kennedy <davidk...@nospamherethankyou.invalid> wrote:

> Jon B wrote:
> > David Kennedy <davidk...@nospamherethankyou.invalid> wrote:
> >
> >> My G4 has developed a noisy fan over the past few weeks - not generally
> >> a problem as it only tends to happen if I'm video processing or similar
> >> and I can leave the machine to do that overnight.
> >>
> >> But, I wondered, is this a sign that the fan might fail?
> >
> > Sods law mechanicals, it could fail anytime in the next 5mins to 5years.
> >
> >> Should I
> >> replace it before then? Is there any protection built in for if the fan
> >> fails?
> >
> > The thermal cut out kicks in when the temps go too high.
> >
>
> Nice to know.
>
> > I'd install TempMonitor it puts the temps in the top bar, you can keep
> > an eye on if the temps are staying in range. If they start heading up to
> > the danger area then time to get them swapped. Or if you need the
> > machine for anything critical in the near future get it swapped now as
> > you can guess when its going to go.
> >
>
> Done that, it seems to peak at just under 70 degrees.
>

Tad on the warm side I'd say (unless you're talk �F). My notes from the
17" 1.67 earlier in the year

General use should run around 40-45�C and only ramp up if you've got
something hittin the processor, then should run upto around 60ish, with
the max being around 67�C

The one I fixed earlier in the year had a combination or an errant
clamscan process (helping it to keep warm) and a dodgy fan.

> >> It does seem like one of those jobs that's not really very nice.
> >
> > Yeah it's about a 2hr job for one those
>
> Hmmm.

You know where we are if you need them. Fans can be replaced
individually, and re the grease they are sealed units, and not the pricy
part of the job. I'd replace the fans, not because it makes me extra
money (it doesn't), but because it saves me having to do the job twice.

J. J. Lodder

unread,
Oct 15, 2009, 11:14:00 AM10/15/09
to
David Kennedy <davidk...@nospamherethankyou.invalid> wrote:

So that's what you call: 'My G4'.
It does help if you repeat the content
of the Subject: header in the body of your posting,

Jan

David Kennedy

unread,
Oct 15, 2009, 11:28:09 AM10/15/09
to
Jon B wrote:
>
> You know where we are if you need them. Fans can be replaced
> individually, and re the grease they are sealed units, and not the pricy
> part of the job. I'd replace the fans, not because it makes me extra
> money (it doesn't), but because it saves me having to do the job twice.

I would agree that replacing the fan makes sense. Temps around 66
Celsius as a peak under load - encoding etc. but for normal use 50 seems
to be the max.

I'm going to keep an eye on it over the weekend [I don't have a spare
machine at the moment - apart from a G3 ibook - what would I do without
it...]

David Kennedy

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Oct 15, 2009, 11:28:40 AM10/15/09
to

Ooops.

David Kennedy

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Oct 23, 2009, 4:33:49 PM10/23/09
to
Jon B wrote:
>
> You know where we are if you need them. Fans can be replaced
> individually, and re the grease they are sealed units, and not the pricy
> part of the job. I'd replace the fans, not because it makes me extra
> money (it doesn't), but because it saves me having to do the job twice.

Well, managed to find a set of fans and am now looking around for a new
HD. Might as well make the most of it if I'm going to dive in. Am I
correct in thinking that as its an IDE then 320 gig is the largest I can
practically go for?

As a temporary measure, I reduced the thresholds for all the fans so
that they kick in earlier and don't let it heat up so much so the dodgy
one isn't working so hard.

Jon B

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Oct 26, 2009, 4:36:54 AM10/26/09
to
David Kennedy <davidk...@nospamherethankyou.invalid> wrote:

> Jon B wrote:
> >
> > You know where we are if you need them. Fans can be replaced
> > individually, and re the grease they are sealed units, and not the pricy
> > part of the job. I'd replace the fans, not because it makes me extra
> > money (it doesn't), but because it saves me having to do the job twice.
>
> Well, managed to find a set of fans and am now looking around for a new
> HD. Might as well make the most of it if I'm going to dive in. Am I
> correct in thinking that as its an IDE then 320 gig is the largest I can
> practically go for?
>

Yes I 320GB is the largest I've seen
<http://www.ebuyer.com/product/158609>

Whilst ordering the drive don't forget some
<http://www.ebuyer.com/search?q=thermal+paste&x=0&y=0>
for the heat sinks

> As a temporary measure, I reduced the thresholds for all the fans so
> that they kick in earlier and don't let it heat up so much so the dodgy
> one isn't working so hard.

Sounds a sensible precaution.

David Kennedy

unread,
Oct 26, 2009, 9:53:49 AM10/26/09
to
Jon B wrote:
> David Kennedy <davidk...@nospamherethankyou.invalid> wrote:
>
>> Jon B wrote:
>>> You know where we are if you need them. Fans can be replaced
>>> individually, and re the grease they are sealed units, and not the pricy
>>> part of the job. I'd replace the fans, not because it makes me extra
>>> money (it doesn't), but because it saves me having to do the job twice.
>> Well, managed to find a set of fans and am now looking around for a new
>> HD. Might as well make the most of it if I'm going to dive in. Am I
>> correct in thinking that as its an IDE then 320 gig is the largest I can
>> practically go for?
>>
> Yes I 320GB is the largest I've seen
> <http://www.ebuyer.com/product/158609>
>

Ordered yesterday - thanks.

> Whilst ordering the drive don't forget some
> <http://www.ebuyer.com/search?q=thermal+paste&x=0&y=0>
> for the heat sinks
>

I got some of this

<http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=380167374340>

which looks quite similar...

Jon B

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Oct 26, 2009, 9:38:21 AM10/26/09
to
David Kennedy <davidk...@nospamherethankyou.invalid> wrote:

> Jon B wrote:
> > David Kennedy <davidk...@nospamherethankyou.invalid> wrote:
> >
> >> Jon B wrote:
> >>> You know where we are if you need them. Fans can be replaced
> >>> individually, and re the grease they are sealed units, and not the pricy
> >>> part of the job. I'd replace the fans, not because it makes me extra
> >>> money (it doesn't), but because it saves me having to do the job twice.
> >> Well, managed to find a set of fans and am now looking around for a new
> >> HD. Might as well make the most of it if I'm going to dive in. Am I
> >> correct in thinking that as its an IDE then 320 gig is the largest I can
> >> practically go for?
> >>
> > Yes I 320GB is the largest I've seen
> > <http://www.ebuyer.com/product/158609>
> >
>
> Ordered yesterday - thanks.
>

No probs, must remember to update my stick with MacSoup so can read the
froup over the weekends.

> > Whilst ordering the drive don't forget some
> > <http://www.ebuyer.com/search?q=thermal+paste&x=0&y=0>
> > for the heat sinks
> >
>
> I got some of this
>
> <http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=380167374340>
>
> which looks quite similar...

That'll do, just making sure as easier to pick up now, than to find out
when you strip it that it is required.

David Kennedy

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Oct 26, 2009, 11:25:26 AM10/26/09
to

Gosh. That was clever, you replied before I posted.

But seriously, thanks for the help and, if it comes to the worst, I'll
post you a box of bits...

Jon B

unread,
Oct 26, 2009, 11:50:45 AM10/26/09
to
David Kennedy <davidk...@nospamherethankyou.invalid> wrote:

> Jon B wrote:
> > David Kennedy <davidk...@nospamherethankyou.invalid> wrote:
> >
> >> Jon B wrote:

> >>> David Kennedy <davidk...@nospamherethankyou.invalid> wrote:
> >>>
> >>> Whilst ordering the drive don't forget some
> >>> <http://www.ebuyer.com/search?q=thermal+paste&x=0&y=0>
> >>> for the heat sinks
> >>>
> >> I got some of this
> >>
> >> <http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=380167374340>
> >>
> >> which looks quite similar...
> >
> > That'll do, just making sure as easier to pick up now, than to find out
> > when you strip it that it is required.
>
> Gosh. That was clever, you replied before I posted.
>

Wonder if I've not quit 'soup since the time change.

> But seriously, thanks for the help and, if it comes to the worst, I'll
> post you a box of bits...

No problems, and you wouldn't be the first

Jaimie Vandenbergh

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Oct 26, 2009, 3:14:51 PM10/26/09
to
On Mon, 26 Oct 2009 16:50:45 +0100, black...@jonbradbury.com (Jon B)
wrote:

>David Kennedy <davidk...@nospamherethankyou.invalid> wrote:
>
>> Jon B wrote:
>> > David Kennedy <davidk...@nospamherethankyou.invalid> wrote:
>> >
>> >> Jon B wrote:
>> >>> David Kennedy <davidk...@nospamherethankyou.invalid> wrote:
>> >>>
>> >>> Whilst ordering the drive don't forget some
>> >>> <http://www.ebuyer.com/search?q=thermal+paste&x=0&y=0>
>> >>> for the heat sinks
>> >>>
>> >> I got some of this
>> >>
>> >> <http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=380167374340>
>> >>
>> >> which looks quite similar...
>> >
>> > That'll do, just making sure as easier to pick up now, than to find out
>> > when you strip it that it is required.
>>
>> Gosh. That was clever, you replied before I posted.
>>
>Wonder if I've not quit 'soup since the time change.

If so, that's a trick that Entourage shares (I discovered this
morning). Why don't these apps ask the OS for the time every time they
need it? They must keep their own clock, which is just insane.

Cheers - Jaimie
--
"Shellfish are the prime cause of the decline of morals and the
adoption of an extravagant life style" -- Pliny the Elder

David Kennedy

unread,
Oct 26, 2009, 4:30:33 PM10/26/09
to
Jaimie Vandenbergh wrote:
> On Mon, 26 Oct 2009 16:50:45 +0100, black...@jonbradbury.com (Jon B)
> wrote:
>
>> David Kennedy <davidk...@nospamherethankyou.invalid> wrote:
>>
>>> Jon B wrote:
>>>> David Kennedy <davidk...@nospamherethankyou.invalid> wrote:
>>>>
>>>>> Jon B wrote:
>>>>>> David Kennedy <davidk...@nospamherethankyou.invalid> wrote:
>>>>>>
>>>>>> Whilst ordering the drive don't forget some
>>>>>> <http://www.ebuyer.com/search?q=thermal+paste&x=0&y=0>
>>>>>> for the heat sinks
>>>>>>
>>>>> I got some of this
>>>>>
>>>>> <http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=380167374340>
>>>>>
>>>>> which looks quite similar...
>>>> That'll do, just making sure as easier to pick up now, than to find out
>>>> when you strip it that it is required.
>>> Gosh. That was clever, you replied before I posted.
>>>
>> Wonder if I've not quit 'soup since the time change.
>
> If so, that's a trick that Entourage shares (I discovered this
> morning). Why don't these apps ask the OS for the time every time they
> need it? They must keep their own clock, which is just insane.

Especially now that most users sync the system clock there's simply no
need for it.

Rowland McDonnell

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Oct 27, 2009, 6:55:53 AM10/27/09
to
David Kennedy <davidk...@nospamherethankyou.invalid> wrote:

> My G4 has developed a noisy fan over the past few weeks - not generally
> a problem as it only tends to happen if I'm video processing or similar
> and I can leave the machine to do that overnight.
>
> But, I wondered, is this a sign that the fan might fail?

Either that, or there's a build-up of dirt or - well:

Basically, you're either looking at:

Damaged bearing (making the fan and housing vibrate)

Damaged fan/housing (messing up air flow)

Muck accumulation (messing up air flow)

>Should I
> replace it before then?

I would.

> Is there any protection built in for if the fan
> fails?

I doubt it - read on.

> It does seem like one of those jobs that's not really very nice.

A cautionary tale.

I failed to replace the noisy-fanned graphics card in my old 2G4.

One day, the fan bearing failed. I heard it happen, the fan stopped,
almost immediately something overheated and went `pop', and the screen
went really strange briefly before the Mac died.

I put a replacement graphics card in. Turns out the Mac wouldn't work
any more - one of the CPUs was dead, and one RAM SIMM trashed (at
least).

Rowland.

--
Remove the animal for email address: rowland....@dog.physics.org
Sorry - the spam got to me
http://www.mag-uk.org http://www.bmf.co.uk
UK biker? Join MAG and the BMF and stop the Eurocrats banning biking

David Kennedy

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Nov 10, 2009, 2:17:50 PM11/10/09
to
Jon B wrote:
> David Kennedy<davidk...@nospamherethankyou.invalid> wrote:
>
>> But seriously, thanks for the help and, if it comes to the worst, I'll
>> post you a box of bits...
>
> No problems, and you wouldn't be the first

Well, fin ally, that's it. Job done.

No more fan noise and 320 gigs of storage - well, an extra 200 really
but it still makes a big difference, all I have to do now is wait while
it chugs through those endless software updates...

Jon B

unread,
Nov 11, 2009, 5:51:04 AM11/11/09
to
David Kennedy <davidk...@nospamherethankyou.invalid> wrote:

> Jon B wrote:
> > David Kennedy<davidk...@nospamherethankyou.invalid> wrote:
> >
> >> But seriously, thanks for the help and, if it comes to the worst, I'll
> >> post you a box of bits...
> >
> > No problems, and you wouldn't be the first
>
> Well, fin ally, that's it. Job done.
>

Yay. Any left over screws?

> No more fan noise and 320 gigs of storage - well, an extra 200 really
> but it still makes a big difference, all I have to do now is wait while
> it chugs through those endless software updates...

Yeah it's often worth looking sorting out HD capacity whilst you are in
there, isn't that much more compared to the work involved of doing it in
a few months.

David Kennedy

unread,
Nov 11, 2009, 6:50:02 AM11/11/09
to
Jon B wrote:
> David Kennedy<davidk...@nospamherethankyou.invalid> wrote:
>
>> Jon B wrote:
>>> David Kennedy<davidk...@nospamherethankyou.invalid> wrote:
>>>
>>>> But seriously, thanks for the help and, if it comes to the worst, I'll
>>>> post you a box of bits...
>>>
>>> No problems, and you wouldn't be the first
>>
>> Well, fin ally, that's it. Job done.
>>
> Yay. Any left over screws?
>

Only 1. I had to drill one screw out of the heat sink after trying with
no success for almost 40 minutes to loosen it.

The new fan is also slightly noisy...

>> No more fan noise and 320 gigs of storage - well, an extra 200 really
>> but it still makes a big difference, all I have to do now is wait while
>> it chugs through those endless software updates...
>
> Yeah it's often worth looking sorting out HD capacity whilst you are in
> there, isn't that much more compared to the work involved of doing it in
> a few months.

Yes, well worth while now I'm up and running again. It was, to be fair,
easier than I'd expected and compared with similar operations on the old
white ibooks quite straight forward - once I remembered the two screws
in the battery compartment that is.

Jon B

unread,
Nov 11, 2009, 6:53:44 AM11/11/09
to
David Kennedy <davidk...@nospamherethankyou.invalid> wrote:

> Jon B wrote:
> > David Kennedy<davidk...@nospamherethankyou.invalid> wrote:
> >
> >> Jon B wrote:
> >>> David Kennedy<davidk...@nospamherethankyou.invalid> wrote:
> >>>
> >>>> But seriously, thanks for the help and, if it comes to the worst, I'll
> >>>> post you a box of bits...
> >>>
> >>> No problems, and you wouldn't be the first
> >>
> >> Well, fin ally, that's it. Job done.
> >>
> > Yay. Any left over screws?
> >
>
> Only 1. I had to drill one screw out of the heat sink after trying with
> no success for almost 40 minutes to loosen it.
>

Some can be a complete pain in the arse that way, I've got quite a few
variants of cross head screwdrivers to try and avoid that, but in the
end some of the buggers do come down to mask em up and drill them out.

> The new fan is also slightly noisy...
>

%&�*@!!

> >> No more fan noise and 320 gigs of storage - well, an extra 200 really
> >> but it still makes a big difference, all I have to do now is wait while
> >> it chugs through those endless software updates...
> >
> > Yeah it's often worth looking sorting out HD capacity whilst you are in
> > there, isn't that much more compared to the work involved of doing it in
> > a few months.
>
> Yes, well worth while now I'm up and running again. It was, to be fair,
> easier than I'd expected and compared with similar operations on the old
> white ibooks quite straight forward - once I remembered the two screws
> in the battery compartment that is.

The worst bit of the iBooks is really just getting the two cases apart.
With suitable tools and the confidence to plug away (which comes from
doing enough of them) they aren't that bad.

David Kennedy

unread,
Nov 11, 2009, 8:25:00 AM11/11/09
to
Jon B wrote:
> David Kennedy<davidk...@nospamherethankyou.invalid> wrote:
>
>> Jon B wrote:
>>> David Kennedy<davidk...@nospamherethankyou.invalid> wrote:
>>>
>>>> Jon B wrote:
>>>>> David Kennedy<davidk...@nospamherethankyou.invalid> wrote:
>>>>>
>>>>>> But seriously, thanks for the help and, if it comes to the worst, I'll
>>>>>> post you a box of bits...
>>>>>
>>>>> No problems, and you wouldn't be the first
>>>>
>>>> Well, fin ally, that's it. Job done.
>>>>
>>> Yay. Any left over screws?
>>>
>>
>> Only 1. I had to drill one screw out of the heat sink after trying with
>> no success for almost 40 minutes to loosen it.
>>
> Some can be a complete pain in the arse that way, I've got quite a few
> variants of cross head screwdrivers to try and avoid that, but in the
> end some of the buggers do come down to mask em up and drill them out.
>
Exactly. I buggered up one driver completely and in the end I just
couldn't see any other way. They seem to be using some kind of lock fast
on the threads - a pale blue coating on the last three [or so] threads
on all the heat sink screws.

>> The new fan is also slightly noisy...
>>
>
> %&�*@!!
>

Something like that.

>>>> No more fan noise and 320 gigs of storage - well, an extra 200 really
>>>> but it still makes a big difference, all I have to do now is wait while
>>>> it chugs through those endless software updates...
>>>
>>> Yeah it's often worth looking sorting out HD capacity whilst you are in
>>> there, isn't that much more compared to the work involved of doing it in
>>> a few months.
>>
>> Yes, well worth while now I'm up and running again. It was, to be fair,
>> easier than I'd expected and compared with similar operations on the old
>> white ibooks quite straight forward - once I remembered the two screws
>> in the battery compartment that is.
>
> The worst bit of the iBooks is really just getting the two cases apart.
> With suitable tools and the confidence to plug away (which comes from
> doing enough of them) they aren't that bad.

I also had some problems when installing a backlight on one. A complete
pain just routing the cables to get things back together.

davidke...@gmail.com

unread,
Nov 19, 2009, 5:42:49 AM11/19/09
to
On 11 Nov, 11:53, black.h...@jonbradbury.com (Jon B) wrote:
> DavidKennedy<davidkenn...@nospamherethankyou.invalid> wrote:


> > Yes, well worth while now I'm up and running again. It was, to be fair,
> > easier than I'd expected and compared with similar operations on the old
> > white ibooks quite straight forward - once I remembered the two screws
> > in the battery compartment that is.
>

Well, it was good while it lasted...

On friday [the 13th] I was using the PB when it suddenly shut down -
the power cable had come out - and went to sleep. I was in a bit of a
hurry so I plugged it in and went out. Wile I was out I managed to
slip and break my arm...

Anyway, the PB wouldn't then wake from sleep. I tried all the usual
tricks and finished by leaving it overnight unpowered. Since then it
has resolutely refused to show any sign of life.

Any ideas ?

Jon B

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Nov 19, 2009, 6:38:17 AM11/19/09
to
davidk...@NOSPAMTODAYTHANKSVERYMUCH.dmnc.freeserve.co.uk
<davidke...@gmail.com> wrote:

Have you pulled battery & power lead just to make sure it hasn't crashed
whilst asleep? (just starting with the obvious to start), if not that
try PMU reset
http://support.apple.com/kb/HT1431
if neither of those work come back and will dig the diag chart out...

davidke...@gmail.com

unread,
Nov 19, 2009, 7:36:25 AM11/19/09
to
On 19 Nov, 11:38, black.h...@jonbradbury.com (Jon B) wrote:

>
> Have you pulled battery & power lead just to make sure it hasn't crashed
> whilst asleep? (just starting with the obvious to start), if not that

> try PMU resethttp://support.apple.com/kb/HT1431


> if neither of those work come back and will dig the diag chart out...
>

That was top of the list Jon with no luck. Also tried the PMU reset
with no result. I'm now waiting for the goat to be delivered for
sacrifice this next midnight...

Jon B

unread,
Nov 19, 2009, 9:46:09 AM11/19/09
to
davidk...@NOSPAMTODAYTHANKSVERYMUCH.dmnc.freeserve.co.uk
<davidke...@gmail.com> wrote:

Right, once it turns midnight and you've secured your goat...

1.Remove any connected peripherals and eject any PC card.
2. Check that the battery has enough charge to start the computer by
pressing the button
next to the LEDs on the battery. At least one LED must light solid (not
flashing).
3. Connect a known-good Apple 65W Portable Power Adapter (661-3048) and
power
cord or plug to a known-good power outlet; make sure the DC plug is
firmly inserted.
The DC plug should light up, if not, replace Sound/DC-in board.
Important: The Apple 65W Portable Power Adapter is highly recommended to
be
used with the PowerBook G4 (15-inch FW800) computer. The adapters can be
identified by 65W in the name and markings, and the metal securing-stud
on the plug
connector. Although previous 45W power adapters (see Knowledge Base
article
88231 PowerBook and iBook: Apple Power Adapter) are plug compatible with
the
PowerBook G4 (15-inch FW800), it may not provide sufficient power during
some
activities and power may be drawn temporarily from the battery.
4. Try powering up without the battery installed (only works with 65W
power adapter). If it
boots, replace battery connector cable.
5. Perform the keyboard PMU reset procedure described in the
Troubleshooting Aid
section.
Warning: Resetting the power manager will permanently remove a RAM disk,
if
present, and all of its contents. You will also need to reset the date
and time
(using the Date & Time system preference pane).
6. Press Caps Lock key to see if key light comes on. If it does, hold
power button down
for six seconds to shut down the computer and restart.
7. If it still doesn't start, verify power button cable is connected
properly to top case flex
cable assembly and that the flex cable is connected correctly to the
logic board, if
power button is not functioning correctly or damaged, replace the top
case.
8. Disconnect keyboard completely. Inspect connectors. Restart with
keyboard
disconnected.
9. Remove any additional RAM.
10. Remove AirPort Extreme Card.
11. Verify Sound/DC-in board cable is securely connected.
12. Try disconnecting the AirPort Extreme flex connector from the logic
board and start
the computer. If it starts, shut it down and check the flex cable
connector and the
connector on the logic board and replace the damaged parts.
13. Repeat step 12 with the following flex cables one at a time,
reconnecting each before
proceeding to the next cable:
• Sound/DC-in flex cable
• Hard drive flex cable
• Optical drive flex cable
• PC card cage flex cable
• Keyboard flex cable
• Trackpad flex cable
• Right USB flex cable
• Modem flex cable
If the computer starts up, inspect the flex cable connector and its
connector on the
logic board for damage and replace the damaged parts.
14. Try known-good Sound/DC-in board.
15. Replace logic board.

davidke...@gmail.com

unread,
Nov 20, 2009, 7:18:53 AM11/20/09
to
On 19 Nov, 14:46, black.h...@jonbradbury.com (Jon B) wrote:

> Right, once it turns midnight and you've secured your goat...
>

SNIP

Thanks for that Jon, once I have some assistance I'll check everything
- being one armed is a bit limiting at the moment. Still, at least I
have this icebook to fall back on

David Kennedy

unread,
Dec 4, 2009, 11:05:29 AM12/4/09
to

Well, where to start...

Over the previous week I dismantled it and checked everything I could
with absolutely no success.

Today I plugged in the power adaptor and it worked...

Perhaps it was a delayed action goat?

Jon B

unread,
Dec 4, 2009, 2:06:08 PM12/4/09
to
David Kennedy <davidk...@nospamherethankyou.invalid> wrote:

Well you do have to ensure the goat is thoroughly drained first

Chris Ridd

unread,
Dec 4, 2009, 2:37:55 PM12/4/09
to
On 2009-12-04 19:06:08 +0000, Jon B said:

> David Kennedy <davidk...@nospamherethankyou.invalid> wrote:
>
>> davidk...@NOSPAMTODAYTHANKSVERYMUCH.dmnc.freeserve.co.uk wrote:
>>> On 19 Nov, 14:46, black.h...@jonbradbury.com (Jon B) wrote:
>>>
>>>> Right, once it turns midnight and you've secured your goat...
>>>>
>>> SNIP
>>>
>>> Thanks for that Jon, once I have some assistance I'll check everything
>>> - being one armed is a bit limiting at the moment. Still, at least I
>>> have this icebook to fall back on
>>
>> Well, where to start...
>>
>> Over the previous week I dismantled it and checked everything I could
>> with absolutely no success.
>>
>> Today I plugged in the power adaptor and it worked...
>>
>> Perhaps it was a delayed action goat?
>
> Well you do have to ensure the goat is thoroughly drained first

Paging Jim!
--
Chris

David Kennedy

unread,
Dec 5, 2009, 3:40:09 PM12/5/09
to

:-D

But, on a serious note, it would seem to be a dodgy battery. Checking it
I noticed that if you tap it while the button is depressed the number of
lights drops from 4 to one or even none...

Dodgy internal connection?

Jon B

unread,
Dec 7, 2009, 10:58:10 AM12/7/09
to
David Kennedy <davidk...@nospamherethankyou.invalid> wrote:

Could be. I'd try pulling the battery if it decides to not boot again.

David Kennedy

unread,
Dec 7, 2009, 11:42:34 AM12/7/09
to
Jon B wrote:
> David Kennedy<davidk...@nospamherethankyou.invalid> wrote:
>
>>
>> But, on a serious note, it would seem to be a dodgy battery. Checking it
>> I noticed that if you tap it while the button is depressed the number of
>> lights drops from 4 to one or even none...
>>
>> Dodgy internal connection?
>
> Could be. I'd try pulling the battery if it decides to not boot again.

Have you - or anyone else for that matter - ever rebuilt a laptop
battery pack?

Phil Taylor

unread,
Dec 8, 2009, 2:53:59 AM12/8/09
to
In article <FrSdnVcxP4bmrYDW...@brightview.co.uk>, David
Kennedy <davidk...@nospamherethankyou.invalid> wrote:

I tried once. It was (I think) a G3 Wallstreet battery. I had to take
it apart with a saw, solder in the new cells and reassemble with epoxy.
It wouldn't quite fit into the machine, and no amount of filing and
fiddling would make it do so. Eventually I gave up and bought a new
one.

Phil Taylor

David Kennedy

unread,
Dec 8, 2009, 3:16:50 AM12/8/09
to

Hmmmmm

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