IBook TrackPad not recognized in System Prefs?

Hello,
I have the Mid-2005 1.42ghz iBook. It's a great machine that I love except for one thing....the scrolling TrackPad. It does not work and is not recognized in System Preferences. It does not show up under Keyboard & Mouse. I've taken the top-case off to check the cables and they all looked tight and even replaced the top-case with a new one and it still doesn't work. I've used the 10.4.4 Tiger install discs as that is what it was shipped with. I'm out of ideas here and am hoping that someone can help me. I've resorted to using a mouse along side of it and it's aggravating. Please don't tell me "Logic Board Replacement." Thanks!

Hey PM and Cornelius,
Well the first thing that comes to mind is that the track pad, keyboard, power and charger are all controlled by that PMU99 that I've been bugging everyone about.
Here's my other post:
"There's been a lot of problems lately on this group with the above mentioned issues. It could be a PMU problem. The PMU is actually a tiny computer within the computer. It's official designation is PMU99.
http://developer.apple.com/documentation/Hardware/DeveloperNotes/Macintosh_CPUs-G4/12inchPowerBookG4/2_Architecture/chapter_3_section4.html
"Power Control IC
The power manager IC in the 12-inch PowerBook G4 is a Mitsubishi M16C/62F microprocessor, also called the PMU99. It operates with its own RAM and ROM. The functions of the PMU99 include:
*controlling the sleep and power on and off sequences
*real time clock
*controlling power to the other ICs
*monitoring the battery charge level
*controlling battery charging
*supporting the interface to the built-in keyboard ( and trackpad )
The 12-inch PowerBook G4 can operate from a 15-volt power outlet on an airliner, however for safety reasons the computer will not allow battery charging. In order for the computer to detect the connection to airline power, the airline power cable should have a sense resistor of 24.3K ohms connected between the power plug's shell and ground.
The PMU99 also provides the hardware interface to the keyboard. Software in the PMU99 IC scans the keyboard, then sends the data to the system in packets like those from the ADB. To the system, the keyboard behaves as if they were ADB devices"
Try resetting it:
http://docs.info.apple.com/article.html?artnum=14449
If that doesn't work try what I call a deep PMU reset.
Pull all power including the battery, push the power button to remove residual charge in soft start capacitors.
Then walk away from it for at least 10 hours.
Now PMU99 has been responsible for soft start in Macs apparently since the first G3s and run all the way thru the G5s. From:
http://www.theapplemuseum.com/index.php?id=30
"Power Macintosh G3/G4/G5 clock/softstart chip: PMU99"
So this deep reset has worked for G3s going back to the Beige and recently a G4 Sawtooth with a 1.5 GB CPU upgrade.
I've also seen problems with the super capacitors that sort of take the place of the PMU battery but that has been on older G3s. These are there to hold settings during battery swaps and not sure what else. I've seen two go open but am not sure what that would mean to all the PMU functions. If it shorted I could see that as a real problem."
Richard

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IBook TrackPad not recognized in System Prefs?

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