I have a 2004 G4 PB. Last year I had a crash and had my hard drive replaced. 8 months later I started having problems on start up and I think it's my board. When I start up, screen has horizontal wavy lines. I can make out my tool bar well enough to go into Dispaly. I then click on the next highest resolution and get and good screen. Then I click back to what it should be and my display is normal. It stays this way until I shut it down and restart. Once in a while it will restart as my normal screen. I am thihnking it's the Board. Apple store quoted me a price of about $400 to $600. (What a range! ) Anyway after spending the money on the hard drive, I don't think it's wise to put more money in a G4 but I cannot afford a new Mac at this time. (Which I would love to do ) So, how much time to you think I can go on this way? Probably a wild guess. If I should lose my screen entirely will that affect all my data? Stupid question, maybe but I am not sure. I feel like I am living on borrowed time. Any input will be appreciated.