Here's what other people have said on this problem:
"
This sounds like the capacitors on the motherboard, this was a common
problem on the 1.25GHZ eMac and Apple did have an extended warranty
for this fault (now expired) I have the same model and it had the same
symptoms, I replaced the capacitors myself (I am an electronics
engineer).
If you open the memory access door and look at the motherboard you can
see some of the affected capacitors, if they are faulty they will be
bulging at the top and may have a brown crusty substance on the top
(where they have ruptured and leaked).
If this is the case then all you can do is replace the motherboard or
find someone to replace the capacitors (or do it yourself).
I am a little hesitant to say it's the capacitors. When I had the capacitors
fail on my eMac 1.25ghz, the computer would simply freeze up. No kernel panics
or anything like that, it just locked up for no reason. I hope you get your
eMac working soon, they were very good machines that were quite capable.
> Well thanks for the help so far trying to sort out my eMac freeze up.
>
> I have taken the lid off and checked the capacitors and they all look fine.
>
> There are a lot of them. The one visible from the hatch are fine, have K
> written on top.
>
> There are two left of the optical drive, one has K on top the other has Y.
> The one with Y has some white stuff on it on one side but it doesn't look
> like a leak and there is no bulging.
>
that is a leak
the white stuff is worse than bulging. that means it popped
your board is bad
"
Sorry, I know that's a lot of reading, but there's some good info there
regarding how to determine if the capacitors are bad.
-Elliott Price
Mac Computer Repair - Santa Barbara
Graphic Design - Artwork Setup
Websites - Low Cost Custom Websites
On Dec 28, 2009, at 2:36 PM, [email protected] wrote:
> Where are the capacitors located? In the power supply itself?
>
>
> -----Original Message-----
> From: Elliott Price <[email protected]>
> To: [email protected]
> Sent: Mon, Dec 28, 2009 5:29 pm
> Subject: Re: eMac hardware problem.
>
> I know there've been quite a few discussions on that on the LEM lists, but I
> don't have any first-had experience, so I'm not sure. I think people had just
> replaced all of the capacitors, since they apparently weren't very high
> quality to begin with.
>
>
> -Elliott Price
> Mac Computer Repair - Santa Barbara
> Graphic Design - Artwork Setup
> Websites - Low Cost Custom Websites
>
> On Dec 28, 2009, at 2:26 PM, [email protected] wrote:
>
>> Have any idea which capacitors and where? Can they be replaced by someone
>> that knows how to use a soldering iron? I have a friend that is an
>> electronics person. He would prefer to have a schematic for the whole thing.
>> Does anyone know where I can find one of those?
>>
>> Thanks again Elliot, and all the others that have offered help.
>>
>> Garth
>>
>>
>> -----Original Message-----
>> From: Elliott Price <[email protected]>
>> To: [email protected]
>> Sent: Mon, Dec 28, 2009 5:17 pm
>> Subject: Re: eMac hardware problem.
>>
>> I know that the G4 eMac motherboards have trouble with bad capacitors, maybe
>> that's your problem.
>>
>>
>> -Elliott Price
>> Mac Computer Repair - Santa Barbara
>> Graphic Design - Artwork Setup
>> Websites - Low Cost Custom Websites
>>
>> On Dec 28, 2009, at 2:14 PM, [email protected] wrote:
>>
>>> The power button doesn't seem to be the problem as I have the case from the
>>> 1.4 on it with a working power button.
>>>
>>>
>>> -----Original Message-----
>>> From: Elliott Price <[email protected]>
>>> To: [email protected]
>>> Sent: Mon, Dec 28, 2009 5:09 pm
>>> Subject: Re: eMac hardware problem.
>>>
>>> My guess is that it would probably work... But in that case, I would just
>>> try plugging the power button in from the 1.2 and see if you get the same
>>> problem. (And/or whatever the button is attached to? Not sure.)
>>>
>>>
>>> -Elliott Price
>>> Mac Computer Repair - Santa Barbara
>>> Graphic Design - Artwork Setup
>>> Websites - Low Cost Custom Websites
>>>
>>> On Dec 28, 2009, at 2:03 PM, [email protected] wrote:
>>>
>>>> You are correct, there isn't a sensor that will determine if the case is
>>>> on or not. No, I don't leave the twist tie connecting the red and black
>>>> wire, as that was only a momentary connection just to turn it on as the
>>>> switch is a momentary switch. So at this point in time, I'm no closer
>>>> than I was when I started. Is it possible to take the mother board
>>>> assembly from the 1.4 and put it into the 1.2 eMac case? They both seem to
>>>> be exactly the same including all the connections from the motherboard to
>>>> the rest of the monitor/computer.
>>>>
>>>> Thanks again Elliot and all those that might have any suggestions.
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: Elliott Price <[email protected]>
>>>> To: [email protected]
>>>> Sent: Mon, Dec 28, 2009 4:46 pm
>>>> Subject: Re: eMac hardware problem.
>>>>
>>>> I don't think so... None of the Macs I've worked on have a sensor or
>>>> button.
>>>> (Oh, well, except the PowerMac G5) Some PC's have that feature, though,
>>>> and beep
>>>> a lot.
>>>> You might look around for a button or slot that could be a sensor...
>>>> although I
>>>> doubt that would be turning it off. I've never actually worked on an eMac,
>>>> but I
>>>> have had problems with power buttons before. You might try just taking out
>>>> the
>>>> twist tie, and powering it up with a keyboard that has a power button on
>>>> it.
>>>>
>>>>
>>>> -Elliott Price
>>>> Mac Computer Repair - Santa Barbara
>>>> Graphic Design - Artwork Setup
>>>> Websites - Low Cost Custom Websites
>>>>
>>>> On Dec 28, 2009, at 1:27 PM, Christian Wacker wrote:
>>>>
>>>> > I might not be correct, but aren't alot of modern macs smart enough to
>>>> > know that they are "nude" and won't run until you "clothe" them (put
>>>> > their shell back on)?
>>>> >
>>>> > On Mon, Dec 28, 2009 at 3:24 PM, <[email protected]> wrote:
>>>> >> I'm not using the power button at all but rather taking a twist tie and
>>>> >> momentarily connecting the red wire to the black wire on the cable
>>>> >> going to
>>>> >> the switch. I don't have the case on it at all as I wanted to make sure
>>>> >> it
>>>> >> worked before I put the case back on. When I put the power cable to the
>>>> >> power button, I had managed to bend the pin in the middle of the power
>>>> >> button without realizing it. Yes, I did manage to lift it and
>>>> >> straighten it
>>>> >> out by using a 1/16 flat screwdriver. So getting it turned on is not the
>>>> >> problem, but rather the fact the compute won't stay on after it is
>>>> >> turned
>>>> >> on.
>>>> >> Thanks. Any other suggestions from you Elliot? Or anyone else for that
>>>> >> matter.
>>>> >>
>>>> >>
>>>> >> -----Original Message-----
>>>> >> From: Elliott Price <[email protected]>
>>>> >> To: [email protected]
>>>> >> Sent: Mon, Dec 28, 2009 3:37 pm
>>>> >> Subject: Re: eMac hardware problem.
>>>> >>
>>>> >> Check to make sure that the power button isn't shorting out, if it's
>>>> >> "pressed" that could cause the problem you're describing. Is the button
>>>> >> assembly removable? You could post on LEM swap and see if you can get
>>>> >> the
>>>> >> button/case part with the button in it.
>>>> >>
>>>> >>
>>>> >> -Elliott Price
>>>> >> Mac Computer Repair - Santa Barbara
>>>> >> Graphic Design - Artwork Setup
>>>> >> Websites - Low Cost Custom Websites
>>>> >> On Dec 28, 2009, at 12:28 PM, [email protected] wrote:
>>>> >>
>>>> >> I have an eMac 1.4 GHz which is a 2005 that had a 80 GB HD and a combo
>>>> >> drive. I wanted to upgrade the hard drive to a 500 GB and a super
>>>> >> drive. I
>>>> >> learned the hard way about being careful when pulling the case off as I
>>>> >> messed up the power button. Yes, I know how to turn it on by shorting
>>>> >> out
>>>> >> the red and black wire to turn it on and then plugging it into a power
>>>> >> strip
>>>> >> and setting it up in preferences to come back on after a power outage.
>>>> >> That
>>>> >> makes it possible to not have to replace the power button, at least not
>>>> >> yet.
>>>> >> My problem is that once I turned it on, I got a message that said I
>>>> >> needed
>>>> >> to turn it off by pressing the reset button or the off switch. Now,
>>>> >> when I
>>>> >> turn it on, the eMac will stay on for a couple of minutes, but not long
>>>> >> enough to fully boot, and then I hear it shutting down and it completely
>>>> >> goes back off. I took the hard drive in it originally and put it into a
>>>> >> 1.2
>>>> >> GHz machine and it boots up just fine. I really don't want to take it
>>>> >> to the
>>>> >> local Apple store and spend $85 to have them check it out if it's
>>>> >> something
>>>> >> simple. Also, does anyone know if I can put the 1.4 GHz motherboard
>>>> >> assembly
>>>> >> into the 1.2 GHz, which does work. If I did that, and I get the same
>>>> >> problem, would that mean it's now the motherboard that is the problem?
>>>> >> Garth
>>>> >> MacBook Intel Core 2 Duo
>>>> >> eMac 1.4
>>>> >> eMac 1.2
>>>> >> Beige G3
>>>> >> G4 Yikes
>>>> >> Thanks in advance for any help anyone can give. I've taken apart plenty
>>>> >> of
>>>> >> computers, both Macs and Windows so I'm not afraid to turn a screw
>>>> >> driver.
>>>> >> --
>>>> >> You received this message because you are a member of the iMac Group, a
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>>>> >> --
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>>>> >
>>>> >
>>>> >
>>>> > --
>>>> > -Sent from a Windows PC
>>>> >
>>>> > --
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>>>> --
>>>> You received this message because you are a member of the iMac Group, a
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>>>> --
>>>> You received this message because you are a member of the iMac Group, a
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>>>
>>> --
>>> You received this message because you are a member of the iMac Group, a
>>> group for those using Apple iMacs and eMacs.
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>>> --
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>>
>> --
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>
> --
> You received this message because you are a member of the iMac Group, a group
> for those using Apple iMacs and eMacs.
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>
> --
> You received this message because you are a member of the iMac Group, a group
> for those using Apple iMacs and eMacs.
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To post to this group, send email to [email protected]
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