Keyboard is getting power, but nothing else.
When I press the power button, I hear a click in the Superdrive, as if it's excepting a disc, and then I hear the hard drive starting to spin up. Then a second later, the hard drive whines down and appears to stop. The "F6 - Number Lock" key on the keyboard also illuminates green up when pressed. The power supply is green when plugged in the Powerbook without the battery and then amber when the battery is installed with one blinking light on the battery led.
So far, I've tried reseating the RAM as well as attempting to start the laptop with only one RAM clip in each slot. I've also tried unplugging the PRAM battery as someone had suggested on ifixit.com, but still the same results. It powers up the same everytime, the Superdrive and then the hard drive. The screen remains off and no Apple chimes, only the keyboard seems to stay on.
Has anyone gone through this same scenario and been successful in finding a solution to the problem(s)? So far, I've read a lot of suggestions, but not anything that actually fixed this sort of thing. Please help! Thank you in advance.
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I zapped the PRAM and now I hear the Apple chime, which I didn't hear before. However, there is still nothing on the screen and the Superdrive and hard drive are still doing the same thing as before, clicking noise as if you're loading or ejecting a cd/dvd and then hard drive makes a few sounds as if it's booting up and then appears to stop.
The power supply appears to be working, because the external battery takes a full charge when plugged in. I checked the PRAM battery and it registers at 4.16 volts and it's a 3.75 volt battery. The output of the battery is 6.51. So, I don't think the PRAM battery is the problem, unless it's outputting too much DC power. I even disconnected the PRAM battery, as some have suggested, but still no change or difference.
Does anyone have any other suggestions?
Thank you in advance.
door Craig