well, i experienced a similar thing .... the display would not light up, holding it against the sun you would be able to see psychedelic structures .... cause of this is (in my case) a broken logic board (motherboard) .... it will be the region where the graphic card is located. to fix it, the logic board needs to be replaced. i think this is an 300-400,- USD investment and i didn't do it yet - instead i got myself a new imac last year (summer). i do intend to have it fixed one day though - because it is still an awesome machine and i am convinced that it was 'snappier than my new g5 imac .... On May 16, 2006, at 9:12 AM, Agron Kurtishi wrote: > Hello to everyone, > > I have a problem booting my Tibook (DVI) G4 . After starting it > up, nothing appears on the display. I can hear the vent and the > hard disk, the cd rom is working aswell, everything works except > for the display. I ve tried the hard reset, tried to connect > through s video to external display..0...The Apple service in > Macedonia came with an idea that maybe the mother board is 'off '. > I was wondering how can every thing else work properly,except for > the display signal. Maybe it is a video card problem. Please tell > me if someone has expirienced a similar problam and how can I make > my powerbook work again. > > Thank you in advance for your comments and guides. > > AARON > >