Harry, You're thinking of the multi-out connectors of the newer Intel Macs, like the MacBook. The OP's G5 has a separate connector for analog and optical audio output. We have already established here that the OP has a problem (not too far off from what you're explaining) with plug detection in the analog jack.
Chance On Fri, Nov 4, 2011 at 10:47 AM, gifutiger <[email protected]> wrote: > Greetings, > > The problem is actually caused by a little switch inside the jack that > gets stuck. When you stick in an audio cable, it pushes the switch > down. If it's an analog cable, the end is made of metal. If it's > optical, the end is made of plastic. If the switch is pressed down, > the computer checks to see if the plug inside is metal or plastic > based on conductivity. When it gets stuck and nothing is in there, it > thinks an optical cable is plugged in since the switch is down but > nothing conductive is in there. That's why it works with headphones or > external analog speakers. > > Comments from an Apple User Group; > Had the same problem as thousands of you, re: dodgey cheap mutiple > output 3.5mm plug. When will they learn one hole for one thing. They > try to be too smart for their own good. Anyway, internal speakers > weren't working so I tried inserting headphones in and out, but no > luck. Then tried inserting a toothpick, but again no luck. Finally > succeeded, against my best judgement, to insert a metal object into an > optical output. By fiddling about I was able to "realease" the contact > that allows the computer to make an assessment on whether a headphone/ > toslink or "nothing" is inserted. The contact is in the 7 o'clock > position. By isloating this contact I gave it a gentle push downwards > and it seems to have fixed the problem, but be gentle as there are > plenty of things to ruin inside that little connector. Good Luck > > So your problem is in the "Toslink" connector. > > You could also try Trashing the file ~/Library/Preferences/ > com.apple.audio.AudioMIDISetup.plist > > Cheers > Harry > San Jose, CA > ø?ºº?ø,¸¸,ø?ºº?ø,¸¸,ø?ºº?ø,¸¸,ø?º?ø > > > > On Nov 1, 7:33 am, jfMac <[email protected]> wrote: >> Newly aquired G5 DP 2ghz with 2gb ram running Leopard, which I updated >> to 10.5.8. Air cooled NOT water. Mostly running quite nicely. >> >> Internal speaker not working thus NO chime or sounds. The headphones >> work fine. >> >> The Sound Preferences output tab lists the build-in-audio (Internal >> speakers) under choose a device for sound output, and lists optical >> digital-out port (Digital Out). No device is connected to the optical >> audio port, and selecting it brings up "the selected device has no >> output controls." If Digital Out is selected Output volume control is >> greyed out. >> >> If Internal speakers is selected the Output volume control is NOT >> greyed out, appears to work but has no effect. Internal speaker >> selection also states "the selected device has no output controls." >> >> I have reset the nvram via open firmware, but made no difference. >> >> An internet search reveals problems with the optical audio port mostly >> refer to portable macs. Solutions range from jamming the headphone >> plug in repeatedly to twisting and turning toothpicks, matchsticks or >> plastic forks into the headphone port at a particular angle. I surmise >> that on the portables there is an optical audio switch inside the >> headphone jack which gets stuck in the on position? >> >> On my machine there is red light lit in the port from boot to >> shutdown. Here's a photo of what the port looks >> like:http://support.apple.com/kb/TA27095?viewlocale=en_US >> >> Pushing the tiny door back on the port does not reveal a switch of any >> kind, and I don't want to go poking around in there without more >> information.The connector cable is I think a toslink optical; I don't >> have one, so it's off to the electronic store. Perhaps, just plugging >> unplugging the cable will have some effect, if my machine suffers from >> a stuck on switch. Who knows? >> >> I have NOT reset the PMU. A PMU reset always seems a drastic/risky >> measure to me, but maybe no more risky than prodding and poking the >> optical audio port itself. >> >> Is there a particular kext or bundle that controls the optical audio >> port, which i could remove/mv or disable? It has to be controlled by >> some kext, which one? >> >> Answers and alternative suggestions appreciated. Thanks. >> >> jfMac > > -- > You received this message because you are a member of G-Group, a group for > those using G3, G4, and G5 desktop Macs - with a particular focus on Power > Macs. > The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette > guide is at http://www.lowendmac.com/lists/netiquette.shtml > To post to this group, send email to [email protected] > For more options, visit this group at http://groups.google.com/group/g3-5-list > -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/g3-5-list
