1 Reply Latest reply: Dec 1, 2012 11:47 AM by Knucklesmac
amberlb Level 1 Level 1

I've been trying to figure out why I can't get my ibook g4 to turn on.


I opened it up to see if there was a problem with the dc in board and this is what I found:

The end nearest to where the adapter plugs in has two small pins next to each other and one of them looks burnt. The one beside it is silver, shiny and looks fine. The one in question is black and a little powdery around it.

I opened the laptop on a whim, I didn't really know what I was looking for.


I bought a new adapter, and it helped for a little while.

I bought a new battery, and it also helped for a little while but it stopped charging after five months of use.

It started shutting off while in use. So I tried resetting the PMU with no results.

When I push the power button, it makes a sound that's hard to describe. It's a grinding whir, I suppose. Sometimes it's really slow and will keep going for a while. Sometimes it's quicker then just stops.


Any advice is greatly appreciated. :)

iBook G4 (14-inch Mid 2005), Mac OS X (10.4)
  • Knucklesmac Level 4 Level 4



    This reminds me of a problem I had on one if my 14" G4 iBooks.

    Whenever I turned on the iBook, the unit would power on fine some times, other times it would  engage the fan to make a whirl sound but nothing on the display. After a while this problem became more frequent. The power adapter, battery and DC inboard was all replace with little success.

    The problem was traced back to a chip on the logic board that had become detached from the board due to heat.


    I wouldn't say this is your fault but its maybe likely.

    The problem no doubt sound like a logic board related problem, as the battery is not charging and its not responsive to the PMU reset.

    My advise would be, get the iBook tested at an apple store or approved repair shop.


    Best of luck.