Q: I have an ibook g4 that boots to blue screen and hangs. Safe mode will boot but hangs after log in. I have reset PRAM, NVRAM, and the PMU. Booted from Diskwarrior and rebuilt and tested the HD, working properly.  Boot from Tiger dvd shows images? no text

Could you get a picture of the screen, load that into your working computer,

and post it into a reply here? There are a few kinds of situations where a

similiar display of that sort may appear.

Given the G4 iBook PPC (which model) is a bit dated now, one has to

assume you have the original 'install-restore' DVD it came with, new.

What was or wasn't it doing, before you chose to try to boot Tiger DVD?

Do you have a second Mac, one w/ FireWire ports; maybe Thunderbolt?

It may be possible to further look into the ailing iBook G4 via FireWire

from a second Mac, and attempt to investigate, or save old data to some

external drive, USB Flash; in case you need to totally wipe the HDD.

An image of the iBook screen may be helpful. Someone else with recent

troubleshooting or extensive use of iBook portables (or other OS X issue)

that presents such a screen instead of a normal progress screen, may

have an immediate idea. Without an image, I am not venturing a guess.

What key did you hold down while trying to boot the computer from DVD?

One set of keys can get you a Startup Manager. Among other options.