Hi, Kurt I would GUESS this is a hardware problem. Others on the list have reported similar problems and I seem to remember that it mostly boiled down to hinge or connector problems. I'm sure you'll get more specific info from them. Good luck. Francesc in Catalonia On Thursday, Jun 12, 2003, at 12:25 Europe/Madrid, sLiving wrote: > > PowerBook G 4 500MHz > > Since yesterday a vertical blue line started to appear in the display > (not > black!) and doesn't go away. > > Nothing helped (PRAM & Power Manager-Reset and unplug/plug monitor > cable). > > Any suggestion? Thanks for help in advance.