Ibook wont start, turn it on and just get the fan to start up.

Hi all,
I have a ibook from early 2004 , 1.2 ghz.
Today i took it out of my bag and turned it on and nothing only the fan started up.
Ive done some reading through the forums here and read that someones ibook wouldnt start up with their airport card installed so i removed that and it started up but only for a couple of minutes, the screen then went black then red then green then blue then white.
I use this laptop to make music and have some new material on it which isnt backed up which is the most important thing for me.
would it be possible to take the harddrive out and put it in an external enclosure to get the data i want from it.
I was planning on buying a macbook soon so saving the actual ibook isnt a priority.
If anyone has any idea what could be wrong with it , i would be really grateful and if i save the music on it i might even send you a free copy of my cd.
Thanks for any help or advise in advance.

The iBook's GPU is a 9200 ATI Radeon Mobility. It is known to be problematic as it has failure rate higher that expected. This chip is not only used in iBooks it's also in IBMs, Compaqs and Sonys. This from Dale at Superior who has seen a lot of failures in these machines. I have a iBook 1.2 12" board with a bad 9200 and am looking for a replacement board/chip. Yes the chip can be replaced but it requires someone who has experience and the proper equipment.
So if someone wants to send me their board I'd be glad to accept it.
If your chip is putting out anything at all it might still be good. Try the shim fix. It's not as easy as the G3 because the 9200 is on the top and shares the heat spreader with 2 other chips. I think the best thing is to apply pressure from the bottom 2.25" to the right of the space between the monitor and headphone output. You'd have to take the bottom off:
http://www.ifixit.com/Guide/Mac/
There is nothing on the bottom to tell you there's a monster GPU chip above it. Try to boot as normal. If it boots properly and seems normal it might continue to work with the shim or you could send it for reball. My guy as Superior is sick so I'm waiting with anxiety hoping he gets better.
Good luck.
Richard

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