The mistake most people make is to assume the common issue is the same across both G3 and G4 iBooks. This is not the case at all. iBook G4's most commonly fail from cracking of the solder on pin 28 of the Vreg chip (see my earlier link for details) resulting in a complete failure to power up or a sudden loss of video. iBook G3's most commonly fail from cracking of the Ball Grid Array solder below the GPU itself. On the G4 the affected solder is exposed and can be repaired with a soldering iron, while on the G3 the solder is not exposed and can not be repaired with a soldering iron. A heat gun is the only cheap fix the G3 defects.The G3 IceBooks use BGA so its not really possible to resolder just ONE pin.Nice work - hope it goes well!I have a few iBook G3 500MHz's to repair at some point - I don't know why I like the icebooks - I just do
Although the symptoms are similar, boot and video problems, and they both seem to occur from the same source (flexing of the logic board in the lower left corner, to the left of the trackpad), the chips and solder that become damaged are an entirely different kettle of fish altogether.