Try resetting the PRAM through Open Firmware:

Boot Mac while simultaneously holding Command+Option+O+F

When at the command prompt type the following:

reset-nvram <Enter>

reset-all <Enter>

The Mac should now reboot into OSX with a reset PRAM.

Also the RAM slot on this machine tends to fail. I would remove the RAM and try rebooting.

The 12" machines do not have PRAM batteries Chris is correct on the 12" not having a battery. Here's Apple article on it: http://support.apple.com/kb/TA25911?view...

These machines, just like G3 and G4 iBooks do not use PRAM batteries, they use power from the main battery and a capacitor on the logic board to maintain the clock.

hi,

Mr. Chris

oh, i didn't guess that don't have PRAM BATT.

My machine only have a capacitor on the logic board.

i understood. thank you.

i guess main BATT is down too, so doesn't work...

Sir mayer,

you say not Command+Option+P+R, but Command+Option+O+F.

Ok, i will try.

thank you so much, every one.

shige, tokyo.

hi,

Chris

I have PowerBook G4 Aluminum 12".. Problem is that, when i charged it fully and then i open bluetooth or playing DVD, sudenly the battery level become very low , showing 1% or 2% charge.

I have a similar issue.

Does the booting with command option P + R

not work to reset PRAM with this 12" powerbook ?

I had found that on Apple support pages.

thanks

David