hello from sunny Spain.
Have a problem with a PowerBook 15" 800 mGZ . Some how I have
turned off the sound on my headphones port. Have checked the system panel sound panel, and the function keys. Everything is OK there when I remove the mini jack sound comes on the PowerBook speakers.I
have had this problem once before but for the life of me can not remember the fix. Something not connected to sound ??? 
Have a problem with a PowerBook 15" 800 mGZ . Some how I have
turned off the sound on my headphones port. Have checked the system panel sound panel, and the function keys. Everything is OK there when I remove the mini jack sound comes on the PowerBook speakers.I
have had this problem once before but for the life of me can not remember the fix. Something not connected to sound ???