My ibook is starting up with either no screen (not starting up) or a white screen with a big colored block for a cursor.

I can not start in single user, verbose mode.

In safe mode i get the white screen once in a while.

I hear the hard drive start but it stops and I tried booting off an install disk but that did not work.

it has 10.2.xx as its latest.

for kicks I plugged an ethernet cable in and got the blue/grey apple screen with the clock running once but the screen went white with some blue lines at the thirds.

Help