This is the results of a survey I conducted over a year to see what different models of the G4 ibook are affected by the logicboard fault.
The symptoms of the fault are as follows:
Here are the results of a survey I conducted here on macintoshhowto.com over a period of 6 months regarding the affected models. It appears all models are affected.
In this article I described the fix for this G4 logic board fault. This survey was to test what models were impacted.