Powerbook G4 Wont Boot consistently
I have an older Powerbook G4 867. ('Twas my first mac-**sniff**) abt 4 years ago, I was on my couch surfing and the screen went black. I never got it to reboot. A while later I got it to boot out of the blue. It worked fine, ran some software updates but when went back to the same problem when it rebboted for updates.
Today, I decided to pull it out ofthe closet and give it a try. It booted right up! First thing I tried was going onto Disk Utilities and ran all the checks and it showed no problems with the HD.
Ran 4-5 OS X and Java updates, a hand full of office 2004 updates fine. Rebooted every time. I was going to dig up the original OS X discs and boot into the disc and check any thing there. I set it down with the screen open, letting the battery charge while I cooked dinner. I glanced over at it periodically and it was charging and the screen was dimming slowly. After dinner it would not wake, and went into the same symptoms:
When hitting power, you hear a slight click.
Nothing starts, no screen, no welcome chime, etc.
The machine acts like it is powered on, since the CAPS Lock light toggles on and off.
Have to hold Power for 10 seconds then caps lock-and machine "shuts gown" Theres a slight noise when this happens
I researched here and tried the following:
Tried the PMU reset.
I can't do the PRAM since it never goes into start up.
Tried the NVRAM, again, nothing happens-etc.
I am thinking its toast. Thoughts?
PowerBook, Mac OS X (10.4.11)