One additional though. Have you tired a different set of speakers or headphones? There could always be an internal break in the cable.
C On 13/04/2012, at 10:53 , cm wrote: > Hi Tim, > > You could be experiencing a hardware failure. I know it is always a surprise > when hardware fails, but when software fixes doggedly refuse to work it is > indicative of possible hardware problems. > > If you have an external drive, you could try a clean install of any > compatible version of OS X either Snow Leopard or Lion. If the clean install > refused to drive the speakers and your SMC and PRAM have been reset it's hard > to think what else could be causing the problem. > > Cheers, > Carlo > > On 13/04/2012, at 9:50 , Tim Law wrote: > >> Hi, >> >> I have an intel Mac Mini late 2009 running under Lion. >> >> For the last month or so I have not been able to run the external speakers >> that I plug into the headphone socket on the Mac Mini. i.e. no sound comes >> out. >> >> I can use a set of headphones that are connected via a USB port. >> >> I have also noticed that the internal speaker does not work. >> >> Having said that, the internal speaker did work last week, but not this >> week. I moved the computer, clearly upsetting the fung schway?? spelling. >> >> What I have done. >> Following the advice on various forums I deleted the preference files >> com.apple.audio.AudioMIDISetup.plist >> com.apple.audio.AudioMIDISetup.plist.lockfile >> com.apple.soundpref.plist >> >> >> I notice these have not automatically recreated themselves after a restart, >> so I reinstated them from a backup. >> >> I reset the SMC by removing the power cord, holding the power button for 5 >> seconds, releasing the power button, reinserting the power cord and >> restarting. >> I had a little heart attack when the Mac Mini restarted with a folder >> containing a question mark, but DiskWarrior rectified that and all is back >> to normal. >> >> However, none of this has fixed the audio problem. >> >> I would like to be able to play sound from the external speakers and would >> like my computer to be running properly. Anyone found a solution to this, >> not uncommon problem? >> >> Tim >> >> >> >> -- The WA Macintosh User Group Mailing List -- >> Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> >> Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> >> Settings & Unsubscribe - >> <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug> > -- The WA Macintosh User Group Mailing List -- Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> Settings & Unsubscribe - <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug>
