ibook g4 being weird

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Hello. I need some advice...

I convinced my friend to invest in a second hand G4 ibook so he could see relatively risk free whether he wanted to make the leap from PC to Mac. Well, he's fallen in love, so wants to offload the ibook to upgrade to a new Macbook. All is as it should be.

However, a few days ago he was using Adobe Bridge when it suffered a crash. Since then the ibook has been a paperweight.

The symptons have gone like this:

Initially grey apple screen with spinning cog forever, would not boot into system.

After a short while it didn't even get this far. Flashing question mark folder time.

Using disk utility and then disk warrior I was able to deduce that there wasn't a drive. Assumed dead or deseated. Took ibook apart to check. Reseated HDD and found that the ribbon had come away at the motherboard. Reseated. Put back together.

Can now see volume in disk utility and disk warrior, ran repairs.

Upon reboot, grey apple screen forever.

Ran repairs again.

Upon reboot, flashing question mark. Starting to figure drive failed.

Reinstalled system (10.4) as last resort. All OK!!!

Updating to 10.4.11, when updates installing finished with an error. Had to restart.

Flashing question mark folder again... GARGH!!!!!

Bought new HDD today. Fitted, formatted, installed system.

This is when it gets weird... If I shut down and then rebooted from cold, the system would load no problem. If I selected restart then the screen would go from black to grey, then flash and then go to question mark folder. This happened like that reliably for several hours of trying. Managed to update to 10.4.11.

Now, going to flashing question mark every time. Open disk utility from DVD and the volume is now not visible.

What is happening?

Steve
 
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Last time I saw this the drive and flex cable were OK, the logic board was defective. It was intermittent for a while before finally completely failing. It's rare, but does happen.
 
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Hello, just figured I'd post this update to help any future Googlers who have this issue and come across this thread.

Basically, this article fixed it: ibook G4 logic board fix » Blog Archive » ibook G4 logic board fix

I put a bunch of adhevise rubber pads between the case and the heat sink, as well as on the chip identified, and it applied enough pressure to hold it all together and allow it to boot properly. All is well...

Cheers!
 

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