G4 iBook chimes but has black screen.

Question

I have had a series of problems with a 933 MHz G4 iBook.

I have resoldered the known problem pins on the ISL6225 and as far as I can tell all power supplies are functioning.

The hard disk has been erased and an installer is in the optical drive.

At switch-on it chimes but goes no further - I am left with a black (not grey) screen and no functioning optical drive.

It has been like this for a few days and I cannot find a way to get any further.

Any thoughts on things to check or a way to get the installer DVD out would be appreciated.

I have not put the bottom on so can easily monitor voltages and waveforms.

Posted on Jan 8, 2013 12:52 PM

Reply

Answer 1

Plug in a mouse with two mouse buttons and on startup hold both of the mouse buttons as soon as you hear the startup chime. Hope this helps! 🙂 -Dyl

Reply

Answer 2

Level 10

82,965 points

Boot into open firmware.

Command-option-o-f

At the prompt type

eject cd

or

eject disc

And then

mac-boot

once ejected. All commands quoted are followed by return keys.

Reply