I've bought the Powerbook G4 Merury in 2001 when I was in college, although I have a brand new mac now, but it is still my favorite one to have chats on bed before sleep. It worked well untill one day 2 months ago, it has now became easily to hang up. When ever i try to move the body of it, it hangs...and now, it became even worse, it sometimes doens't display after reboot. I can hear the hard drive is running but no display. I think it's a hardware problem cuz I have had the hardisk formated and reinstalled, nothing changed. Does anybody have the same problem ever? P.S, I have tryed my Apple Hardware Test Disk which comes along with the computer, it hangs after all test done successfully, and i think the last one was video test.