You actually can disable sleep...
trpnmonkey41 said:
you can not disable sleep for when the lid is closed
You actually can disable sleep. But this procedure might void your warranty. Most likely it will, since notebooks were designed to dissipate heat all throughout the body, including out the top part (keyboard). And overheating will definitely put your iBook at risk of being damaged. But if you absolutely MUST, here's how...
On the 12" iBook G4, you have to tear open the entire case. Once you get the aluminum (?) cover off, look to the position just below where the "end" or "right arrow" key would be if the keyboard was still here. You'll see a small magnet. There are two ways from here:
1. Take it out.
2. Take some tin foil, wrap it around the small magnet and put it back in. I believe tin foil will make the magnet useless.
The magnet is used to activate a "reed" switch when the lid is closed. The reed switch sends a signal (when the magnet activates it) to the OS telling it to go to sleep.
Do this at your own risk. I personally would not advise you to do so. If you need the LCD to be turned off, just press the F1 button until the LCD is black. That means that the backlight of the LCD is off. The largest portion of energy consumption on LCDs is the backlight because it generates about 10000 candelas per square meter (or nits). I hope that answered the original question.