[HM] Re: dead iMac

[E. Matro]

I got the screen up by pressing the cuda button. The
iMac ran for 18 hours, but it could not reboot it
after being turning off. 

I'm going to press the cuda button again. 

If I get it up and running, can I install the firmware
fix from a cd? 

Can I make changes to a system that's currently in
use? 

Do I have to upgrade to OS 10 after that? I don't have
the disks for it.

If all else fails, I am tempted to try the hardware
reset procedure. Except I know that my bravery is due
to complete ignorance of electricity, so I won't. 

thanks, the files are very helpful. 

-- Eileen


--- Christian Dupuis <d1user at mac.com> wrote:

> On Thursday, December 2, 2004, at 04:49 PM, E. Matro
> wrote:
> 
> > Someone gave me an old flavored iMac; the
> hardndrive
> > blew. I replaced the hard drive, but now the
> machine
> > either dies shortly after startup and/or the
> monitor
> > is dead. Everything I've read says it sounds like
> the
> > fly back transformer burning out because the iMacs
> > have a very bad or nonexistent cooling system
> > (passive??)
> >
> > Okay, fine. It's going to turn into a very
> attractive
> > blue and white boat anchor.
> >
> > What I'd like to know is it the eMacs share the
> same
> > problem. They are starting to look really good
> right
> > now.
> 
> Eileen, before you turn it into a boat anchor, you
> might want to get it 
> looked at by a competent mac tech; what you are
> describing sounds like 
> the firmware issue that occurs if someone tries to
> load an OS X 10.2 
> disk/system in the iMac without first applying the
> proper firmware 
> update.
> 
> If someone tried to run an OS X version of Norton,
> Disk Warrior or 
> TechTool Pro, it probably screwed up the iMac's
> firmware. There is a 
> fix, but it requires disassembling the iMac,
> modifying an older Apple 
> floppy drive cable with jumper connections  to trick
> the system into 
> getting the proper signal from the video circuit
> that allows you to 
> boot with an external monitor and apply the firmware
> patch. The shop I 
> used to work at did a few of those every month, but
> it's not for the 
> faint of heart.
> 
> Here are the references:
> 
> http://docs.info.apple.com/article.html?artnum=86117
> http://www.capecodgraphics.com/imac_firmware.htm
> http://frderi.spymac.net/imacresurrected/
> 
> WARNING: Get a trained technician to do the work, if
> you need to do the 
> hardware reset procedure; there is a fairly
> unhealthy amount of high 
> voltage in the iMac, enough to seriously injure
> someone who does not 
> take proper precautions.
> 
> As far as the eMacs are concerned, they don't share
> the same issue. As 
> a matter of fact, more recent G3 iMacs already come
> with the proper 
> firmware, and aren't affected.
> 
> Hope this helps.
> 
> Chris
> 
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