Indigo ibook sleep mystery

Question

Hi gang, i know this has been discussed here before, but i couldn't find a solution that worked.
i have an insomniac indigo iBook (FireWire). It has the latest firmware installed. It is loaded with OS 9.1 and OSX 10.4.6 (via Xpostfacto).
When running on battery power, the ibook operates normally. Closing the lid puts it to sleep as expected. However, on AC power the machine will sleep only a moment when the lid is closed, then it wakes for a moment, sleeps for a moment, wakes, on and on. This will also occur if the machine is on battery power, sleeping with the lid closed, and is then plugged in. It wakes immediately and begins the sleep/wake cycle. There are no USB devices attached at all. I have checked the aiport card and keyboard to make sure they are seated properly. I have cleared the NVRAM, PRAM, and OS X pref files mentioned in another post here.
Note that the symptoms are the same when i boot into OS 9! ***?
iMac G5 (2004) 20", Indigo iBook 366, PB G4 1.5 15", Duo 2300c, Newtons   Mac OS X (10.4.6)  

Answer 1

I had the same problem with my 1st generation
clamshell running os 9. I finally took it apart and
found that the charger board cable was slightly
loose. I am still not sure if the problem was fixed
by not having power to the motherboard for a day and
a half, or by the loose cable. Taking all power from
the iBook for a few hours might not be enough because
it has an electrolyte capacitor that retains power
for hours.
First I would try to take power away for a day or two
and see if that helps. The reason the connection on
mine was loose is probably because someone dropped it
down 2 flights of stairs (the iBook was fine, I
can't say as much for the person who dropped it :~)
iBook G4 14" 1.42 GHz
60GB 768MB   Mac OS X (10.4.6)  
Thank you Sir!
It would appear that the power board was the culprit. I removed the keyboard and top casing, but not all the way down to the power board. I removed the screw above it, pushed down firmly on the area, replaced the screw and tightened it all up.
Since reassmebly, the iBook sleeps normally when closed under AC power! The only caveat is that it sometimes wakes when jostled (again, under AC) but it goes back to sleep normally immediately. These symptoms provide more evidence of an AC board issue. I know a lot of folks have had issues with this board over the years.
Thanks again!
scott t
iMac G5 (2004) 20", Indigo iBook 366, PB G4 1.5 15", Duo 2300c, Newtons   Mac OS X (10.4.6)