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

[nagable at comcast.net]

In that case you will probably have to replace the logic board--the PMU has gone south.

Nate
 -------------- Original message ----------------------
From: Technophobic_Tom at comcast.net
> On Wed, 25 Apr 2007 22:08:06 +0000, Nate wrote:
> 
> >Unplug the machine, open it up, take the battery out.  Press the PMU 
> >button (I use the eraser part of a standard wooden lead pencil) and 
> >hold it down for a second or so--you may hear a very faint click. 
> >Wait about 15 minutes, then put the battery back in (check the 
> >voltage again first).  Close it up, plug it in, then try again.
> 
> As I stated, I've done that..."I've tried every possible combination 
> of PMU and battery antics that I've seen on the forums and that I can 
> matrix." I unpluged the 120 AC, took out the battery, let it set over 
> night, pressed the PMU, came back hours latter, replaced a new 
> battery...nada. I've also done the same with all external cables 
> remove including the mouse and keyboard...nada. I've done that with 
> the video card removed as well...nada.
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