[G4] MDD no start, grey screen, no bong

[S. Kennedy]

I have the same model Mac as yours and what you are describing has happened to me twice.  The first time I opened it up, removed the hard drives and the battery to check the voltage.  While it was still open I plugged it in and hit the power button and it tried to start up ( fans running normally, etc.) but of course without a OS or monitor nothing happened.  I put everything back together and it started up normally.  I have no idea what really was the cause but I suspect letting it sit without a battery for some time while I was fiddling with the drives put things back in order. The second time I simply removed the battery and pushed the pmu switch but it took a couple of tries.  I probably didn't allow enough time at first.  Don't remember if I pushed the switch more than once.

I think that both times the trigger was a power outage of short duration while the machine was asleep.  Similar power outages while the machine was in use have never caused a similar problem.

S. Kennedy


On Wed, 25 Apr 2007 12:12:04 -0400, Technophobic_Tom at comcast.net wrote:
> 
> From a dead start; push the power button, the button light comes on 
> doesn't go off until the button is released, the fan runs quietly, I 
> hear/feel the HD or DVD index two or three times (I think that's what 
> it is), after 8-10 seconds the fan goes into turbine mode and that's 
> the way things will remain - no bong. I push and hold the power 
> button again at which time the button light comes on and remains on 
> as long as I continue to depress the button. After about 5-8 seconds 
> the machine shuts off. The button light goes out after I release the 
> button.