>Next day the same problem except that Sound Preference Output panel >had no stereo balance slider anymore. > >The startup chimes are in stereo (or at least sound comes from both >speakers), yet everything else including modem dialling and alert >sounds come from one speaker. Has he made sure the speaker plug is firmly seated in Mac. I have found them to be pretty sensitive; even rolling the connector slightly in the plug may have positive results (try while music is playing and you will hear sound differences. -- <><><><><><><><><><><><><><><><> Mike Bigley Maineville, Ohio http://www.norbertrunning.com Please support an American Indian Elder & Medicine Man by visiting the above link. <><><><><><><><><><><><><><><><>