may be suffering from a logic board problem.
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
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?!