iBook G4 Hard Drive, or Logic Board failure

Hi, I was just wondering if anyone could help me with this. the iBook that I just inherited from my aunt, (She got a new MB) was working yesterday, whenever the power shut-off on it. (It has a power issue on the logic board, and if it comes unplugged it dies, even though it has a new battery.) so she went to work, and attempted to power it on, it came up, and the apple was on the screen, and the spinner came up, nad it spun for a very long time, eventually the screen flashed, and turned blue, and the spinner came again. After around 15 minutes, she was given the kernal panic screen. She held down the power button, and restarted, only to come up with the old finder face, and a question mark. I rush over with my disc's, and load up the disk utility. It was repairing the disk, and about 3/4 of the way through, it had an error. So, I rebooted, and we got an apple, and it repeated the previous situation, and gave the blue screen, followed by a kernel panic. This time I ran the hardware test, and it says that the logic board passed, but there was an issued with the harddrive.

At first disk utility could find the hard drive, and it reported it as being a 2 TB drive!!!!!!! So I got suspicous about that, and after the hardware test, the computer was reporting that there was no hard drive in the computer at all...

we know for a fact that the drive was either 50, or 80Gb's, (90% sure 80)

My question to you is:
--- Is this the hard drive that has gone bad, or, is it the controller on the logicboard needing to be replaced?

Thanks in advance for any help
-Jordan

thank you

I was going to go to my aunts house today, and replace the HD, I have a small spare 5gb hard drive that I can use to test it. Thanks for all of your help!

Sorry...

I didn't see that anyone had post here lately...

Sorry to here about your problem. If it surged, most likely one of two things have happened:

1- Logic board fried

2- Power inverter (Where the plug goes to) got a big surge, and is not accepting a charge anymore.

Try taking it to a genius, and mention "I understand that I can have you send this to apple repair center for a fee of 300$ and they will fix everything"

But don't tell anyone that I told you that.

Good Luck