[Ham-Mac] Dead G3 iMac, need help please.

[Peter Hunter]

On 15 Nov 2006, at 00:46, Dick Kriss wrote:

> On 11/14/06 5:54 PM, "Peter Hunter" <peter.hunter10 at ntlworld.com>  
> wrote:
>
>> So, has anyone any other ideas to try? I am suspecting the power
>> supply is faulty, but what do YOU think?
>>
>> Hope to hear some useful advice.
>
> Peter,
>
> This may be too obvious but have you tried starting with the Mac OS  
> startup
> disc in the drive while holding down the C key?
>
> See if you can boot from a CD before trying anything else
>
> Something tells me the unit did not come with the machine specific  
> startup
> disc.
>
> Dick AA5VU

Your right Dick, It didn't come with a machine specific startup disc.  
It was heading for the tip. I have tried starting with a system 9.1  
startup disc though, but it wouldn't have it.

However, I have had a bit of progress since my last posting. I  
unplugged the video lead and pressed the on button, and the computer  
started up, all-beit without any video. Or rather, the power supply  
started going, and is still going now. But no disc action, not even  
from the CD (except when I put a CD in the drive. The drive spins but  
no more than that). I was holding the C key down.

I have plugged the video lead - from a good working monitor that is  
attached to my Performa 630 - into the iMac, but I still don't have  
any video on that either.

So, it seems that the computer power supply is ok, but maybe a  
problem on the graphics side. What do you think?

Someone did suggest that the Flyback transformer and PAV board may be  
faulty, but I'm not sure I know what he was taking about.

Peter, G0GSZ