Here is my 6 months of torture, maybe some one can suggest me what to do. Apple tech do not find or unable to reproduce my problems therefore so far has refused to replace the machine. here is the outline and history of my problem: Powerbook G4 12" Date purchased: December 14, 2005 • Repeating problems starting from the first few weeks of use: Main Problems: 1. While working on the computer suddenly a kernel attack happens - regardless of the program I am using (happens with all such as word, safari, iphoto, itunes). A curtain like gray screen rolls down to push the start button to close the computer. – at first this problem happens a few times one after the other, in time the computer does not start up anymore 2. Screen Fragments 3. Computer Freezes 4. Certain programs do not open at all, like Safari Also: While working programs like Safari, Mail. I-photo freezes or Quits by itself Systems Preferences sometimes do not open 6 visits to the Apple Store Concierge and/or Apple Authorized Service for repair. At least 7 times computer’s operating system is reinstalled during these visits and repairs. • Hardware change in the computer: 1. LVDS Cable 2. Logic board 3. Hard Disk AND STILL THE EXACT SAME PROBLEMS KEEP OCCURING!! Side Notes: The computer has been used in different connections and places. The problems occur at all times.