Hi! First thanks for any guidance you may lend. I have a older Powerbook G4 1G and my daughter dropped it yesterday and now the screen is not functioning. I have heard that if the video card was damaged the external monitor function when hooked up won't work is that correct? And, if an external monitor does work it is a screen issue? Currently the external monitor does send the video signal just fine. Then the next question would be; is it difficult to replace the screen if you are handy and somewhat technically inclined? Again, thanks for the help.