Yes, the logic board problem had occurred to me, too. If you pick it up in your left hand and squeeze the case to the left of the trackpad, and that allows you to start up, that is indicative of a failed logic board.
Enough Dual USB G3 iBooks suffered from the logic board problem that Apple began the iBook Logic Board Repair Extension Program in January of 2004. Check out the FAQ page and if the symptoms look familiar, give Apple a call. If the iBook qualifies, it's a free fix.
You can find the original purchase date of the iBook, by entering its serial number into the box at the bottom of Apple's main support page under "About Your Support Coverage."
If it is past the three-year time limit, you may want to consider trying the shim fix suggested by John Sawyer in the Apple Discussions iBook G3 (Dual USB) Displays Forum:
[Y]ou can often fix this yourself by removing the iBook's bottom housing, and placing a shim of any sort, about 1mm to 1.5mm thick, onto the raised square on the bottom shield. I use a Scotch mounting square--you can get them in hardware stores and many grocery stores. When you reinstall the bottom case, it will press against this shim, which will press against the graphics chip, and may allow the chip to come into better contact with the logic board.
CJS Macintosh Repair
Instructions for removing the lower case:
I'm wondering if my problem is related!
I have a 800MHz PowerPC G3 iBook running OS 10.3.9.
I am traveling in Brazil and was going to use my laptop to accomplish several tasks but can't because it won't boot up!
It started giving me garbage once it booted. Then it wouldn't boot at all. I read a few articles and did a Power Management reset. After that I was able to boot once and went into Disk Utilities and did a repair session. When I connected up my Ethernet cable I got garbage on the screen and have not been able to get a clean boot since.
Can anyone help me out? It'd be so nice to use my computer!
It sounds like the logic board could be the problem, all right. A garbled display is one of the symptoms of logic board failure.
What happens if you squeeze the case to the left of the trackpad and keep pressure on it there? Does that allow you start up and work briefly, as long as you keep pressure on the case? If so, follow the link and instructions above.
I took advantage of the iBook Logic Board Repair Extension Program a couple of years ago and have not had as many problems since. However, I tried to start up my iBook earlier and just got beeping and intermittent lights. I tried the trick you mentioned (squeezing to the left of the trackpad), and it worked. Could this mean that my faulty logic board may have been replaced with another faulty logic board?
ibook G3 Mac OS X (10.4.9) European keyboard
Hi, and welcome (back?) to Apple Discussions.
Well, if it has worked for a good length of time, it obviously was not faulty from the start. However, these logic boards are prone to failure, which is why the Logic Board Program was put in place.
It is likely that the logic board has failed again, yes. Perhaps the shim fix will work for you.
I also tried to put a Scotch mounting square on the video chip but it didn't work for long. When the Ibook was getting hot, the problem came back. I think that the mounting square was melting a bit when the Ibook was getting hot and that the shim was not thick enough anymore. So I tried to shim with a felt protector of 1.5 mm instead and the problem seems to be solved so far. Good luck !
I have the same computer than you.
My iBook 14" LCD 32 VRAM won't turn on.
Some minutes before this problem, I verified the hardware of my computer with CD Test Hardware. NO PROBLEM.
I turned OFF my iBook and it won't turn ON.
RESET POWER MANAGER
1)Shift-Control-Option-Power (where Power on keyboard?)
2)Wait 5 sec.
3)Press Power Button
ALWAYS WON'T TURN ON.