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ibook G4--fan runs, black screen

by OwnResolutions / January 7, 2010 12:14 PM PST

My ibook G4 turned itself off and when I tried to power it up the fan turns vigorously while the screen stays black. Thats it.

Prior to this I was doing some pretty heavy music importing and during that time the fan was going nuts (I then stopped importing)...also while it was charging it the past few nights the light on the connector would go out and it stopped charging while it was still plugged in. This was the first time it happened and it happened 2-3 times.

Like for most people my entire life is on that computer along with a very important document that I need to access ASAP. What could be the issue...not the logic board! Suggestions...please?!

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That iBook
by mrmacfixit Forum moderator / January 7, 2010 8:53 PM PST

may be suffering from a logic board problem.

Try this:

Apply pressure to the area to the left of the track pad. Push down and hold down.

Power the iBook up and see if you get any video on the screen.

The iBook G4 was notorious for this logic board problem which is caused by a bad solder joint, or two, around one of the chips on the board. Pushing down in the area described, pushes the bad joints together and allows the thing to work.
It may take a while for you to find the sweet spot, but when you do, I suggest that you get the data off that machine ASAP.
Should you decide to replace the machine, remove the HD before you chunk the machine. Your data is still intact on that drive

No Backups?


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Sounds like it
by OwnResolutions / January 8, 2010 1:03 AM PST
In reply to: That iBook

I have been doing a lot of research and forum surfing and that is what I have concluded as well. I tried the squeeze once last night and when it didn't work the first time I was afraid to reboot and try again because that fan whirring sounds horrible and I am nervous about the HD getting destroyed.

If I take the HD out can I still mess with it to see if that maneuver works? Will it boot without a HD?


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Not exactly,
by mrmacfixit Forum moderator / January 8, 2010 8:24 AM PST
In reply to: Sounds like it

The HD contains the OS that the machine boots from, but, you could use an installation CD/DVD, it should boot from that.


Without either of those installed, the video should still light up


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Thank You!!!
by horseradisho / July 27, 2011 10:49 AM PDT
In reply to: That iBook

My old trusty IBook G4 went black today w/ the fan running hard. I was in a panic. Went on a friends Mac and googled "fan running IBook G4" and after maybe 2 searches found your idea. I held down to the left of track pad (not even sure that being what I was holding down!) and YIPPEEE.....on it goes. And seems good as new hours later.
I just wanted to thank you and tell you it is much appreciated!!

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It should be noted
by Jimmy Greystone / July 27, 2011 11:03 AM PDT
In reply to: Thank You!!!

It should be noted, since apparently there are still people with those things kicking about... Anything short of resoldering the graphics chip is going to be a temporary solution at best. I say you have nothing to lose by trying to milk it for as long as you can, but sooner or later it will stop working.

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(NT) true dat
by mrmacfixit Forum moderator / July 28, 2011 12:53 AM PDT
In reply to: It should be noted
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I read your advice, and I have a similar problem.
by vivianaibookg4 / August 8, 2014 3:50 AM PDT
In reply to: That iBook


My iBook G4 boots up. I hear the chime, but the screen is black. The keyboard works (caps lock and num lock light up, and the volume keys sound). There is no fan sound. I tried pushing on the left side of the mouse pad, but it didn't work. I also connected it to another screen, but the other screen is also black.

The most important information is backed up, but I can't afford another Mac at the moment.

Any other ideas?


12" iBook G4. Tiger 10.4.

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What can you afford?
by R. Proffitt Forum moderator / August 8, 2014 4:06 AM PDT

Repair is unlikely on such machines as cost versus replacement means, well you know that.

Time to reconsider our choices?

This thread is more than 1673 days old. It is very likely that it does not need any further discussion and replying to it will serve no purpose. However, if you feel it is necessary to make a new reply, you can still do so.

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Cost of repair is cheap where I am right now
by vivianaibookg4 / August 8, 2014 7:23 AM PDT
In reply to: What can you afford?

Hi Bob,

Thanks for answering.

If repair is an option, that is good news, actually, both because I am right now in a part of the world where the cost of repair is very cheap and because several technicians had told me it couldn't be repaired.

What they've told me is that the whole main board (is that the same thing as the logic board?) has to be replaced because the video card and everything else is joint together in one big piece.

I have read above, though, that the video card or some kind of joint can be soldered to bring back the image. Is that right?

Thanks so much,

12" iBook G4. Tiger 10.4.

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Your reply has conflicts.
by R. Proffitt Forum moderator / August 8, 2014 7:40 AM PDT

On one hand you write it costs little to fix then you write techs won't repair it. No tech I know will warrant any solder work on the part in suspect. No one I know will pay for a repair without warranty.

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ibook G4--fan runs, black screen
by philandean / March 12, 2015 1:39 AM PDT

I has the same problem and somehow came across the same solution. When I was holding my ibook with one hand thumb positioned just left of the tract pad and I received a screen. Finally I placed a clamp (Very light) about 1" left of pad, started my backup and it worked. Don't move whatever device your using to apply pressure until your finished, with me it went right back to black screen and with every repeated try it gets harder amd harder to turn on

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That's a sign
by R. Proffitt Forum moderator / March 12, 2015 1:47 AM PDT

That you need to get your files out before the end. At least you're getting that chance.

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