Chosen Solution
Hi! I’ve got a 12" 1.33GHZ G4 which boots up fine, but then constantly goes into sleep mode. You can wake it up, but within seconds it goes back to sleep. Occasionally it works longer, but without fail it ends up asleep again, and it is therefore unusable. Thinking it was a reed switch issue, I replaced the entire screen assembly/cabling twice with known good units, and both times it had the same result. I’ve also reset the PRAM and PMU, removed the RAM and battery, tried a different topcase, etc. This model does not have a magnet on the right side by the optical drive, so it’s not that. It seems to be something with the board. Anyone have ideas? Thanks!
John, the reed switch board on the 12" 1.33 is glued to the top of the optical drive and the magnet is screwed in the display right side (center of the display bezel). Disconnect the reed switch cable connector located near the trackpad connector and boot the iBook. If the machine works normally then replace the reed switch board. If the iBook was liquid spilled then the logic board could also be the culprit. iBook G4 12" 1.33 GHz Reed Switch Board Replacement [linked product missing or disabled: IF183-049-1]
I have the same problem with an iBook G4 1.42 Ghz, i recently unmoutes it for a problem i had with de optical drive. Ever since, it constantly goes into sleep mode and when i wake it up the screen shows the desktop for 1 sec and then goes back in sleep mode. I’ve read about a sleep magnet, do you think it’s this magnet the problem and where is it located precisely?
