There is no light, green or red, shining from the headphones port. AHT run on extended - says there are no problems.
Time for Ray's solution me thinks. Tim On 13/04/2012, at 11:24 AM, cm wrote: > Hi Rob, > > Not a bad though, Rob. You are thinking of so-called Toslink or digital > audio. It operates by sending green light pulses down an optical fibre. So if > the light is on the Mac mini is in digital audio mode. When digital audio is > on standard 3.5 mm headphones / speakers will not operate. > > C > > On 13/04/2012, at 11:21 , Rob Phillips wrote: > >> I'm no expert on this, but the audio out can provide both analog and >> digital output, and there's a little microswitch hidden inside the >> socket. If that switch gets accidentally changed, audio fails. There is >> a little light in there which indicates one or the other modes, but I'm >> not sure which is which. >> >> Hope this gives you something to look into. >> >> However, given that the internal speakers also don't work, it could be >> hardware. >> >> Rob >> >> On 13/04/12 10:53 AM, 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> >>> >> >> -- >> Associate Professor Rob Phillips >> Educational Development Unit >> Room 4.42 Level 4 Library North Wing, Murdoch University >> r.phill...@murdoch.edu.au Phone: +61 8 9360 6054 Mobile: 0416 065 054 >> Life member, Australasian Society for Computers in Learning in Tertiary >> Education >> Fellow, Higher Education Research and Development Society of Australasia >> Recent book: Evaluating e-learning: Guiding research and practice >> http://www.routledge.com/9780415881944/ >> >> -- 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> -- 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>
