Hi Anthony,

Don't you just hate computers sometimes.

You probably do not have a doorstop.

Try the following;

Temporarily disconnect all peripherals.

Restart with either the OS9, Disk Warrior, or OS 10 CD by holding down the 'c' Key during re-start. If you can re-install OS9 it will prove that your problem is with the OS 10.2 software install.

Did you check for firmware updates before installing OS 10? Use another computer to check with Apple if you can. If a firmware update was needed but not done, someone with more experience than I will need to help.

On 31/01/2004, at 3:57 PM, Antony N. Lord wrote:

Machine : 400Mhz iMac DV (Graphite)

Machine was working fine with OS 9, decide to do a fresh install [with no OS 9], erase HD, partition, install 10.2 (with view to install 10.3)

OS X works fine but machine hangs a few hours later. Restart it and it does this :

Chimes, powers up (green power switch visible), sound of screen energizing, HD spins up then about 5-6 seconds in (before anything visible appears on screen) the machine partially powers down.

Thanks to the service manual I have checked the power supply flow - the right voltages on the right pins (of the down converter board) are present in the few seconds before it all seems to sag.

The machine doesn't actually go off, the power light remains on but the power being supplied is less than the specification. Flaky PSU or something else?

Have tried resetting PRAM, checking PRAM battery, reseating components, resetting PMU.

Any ideas here or do I have a nice pretty door stop all of a sudden?

Cheers, Antony.

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=   Antony N. Lord           =     http://antonylord.com         =
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Regards,

Greg Manzie

08 9383 3929

Macintosh G4 400 MHz (PCI graphics), 640 Meg RAM, OS10.3.2,
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Alcatel Speed Touch ADSL Modem through built in Ethernet.