G4 won't start after sleep and power disonnect

Hi,
I recently put my MDD G4 to sleep, then inadvertantly cut the power to the machine. Now it won't start up. I push the start button, it lights up as long as I'm holding it (firmly), but nothing happens. No fan, no screen, nothing. I've tried unplugging. There are no devices connected other than display and keyboard.
I'd be grateful for suggestions!
Thanks,
Larry
Powerbook G4 12-inch 1.5GHz - 1.25GB RAM Mac OS X (10.4.6)
MDD G4 1.25GHz - 1GB RAM Mac OS X (10.3.9)

You could also have a bad PRAM battery. I would check it. When mine went, I had no response from my Mac at all; just a light on my power button; absolutely no boot at all.
Check out things in Texas Mac Mans tutorial on the subject. His tutorial is a little dated (don't believe it even mentions G5's) but the info in it, except SMU not being included, still applies. The PMU reset is discussed in there too.
Cheers!
DALE

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