No sound out of speakers

[rmorgan56]

Count me in. Silence this morning on all audio modes (although the phone tones were audible). Shut it down and restarted, same thing; stopped for gas and it was fine when I restarted. 1500 miles.

 

[ctrcbob]

You are not going to believe this. Hell, I don't believe this. It happened to me today.

What is strange is that I had my amplifier changed (due to this problem) over a year ago, and in the past year, the audio has worked perfect, but today, after leaving a restaurant, NO AUDIO. Parked in my garage, then after ten minutes or so, I went back in the garage, pushed the ignition on, and yes, the audio worked again.

When I have a chance, I'm going to look up just when I had the amp changed, so I can tell how long the audio was working correctly. No problems in a year, or more, and now again. Darn.

BTW, I think it was bad luck that this problem happened again, only after someone posts that he had the problem. I think the site owner should install a "No Audio Filter" on this site, so we all don't get jinxed.

 

[ctrcbob]

You are not going to believe this. Hell, I don't believe this. It happened to me today.

What is strange is that I had my amplifier changed (due to this problem) over a year ago, and in the past year, the audio has worked perfect, but today, after leaving a restaurant, NO AUDIO. Parked in my garage, then after ten minutes or so, I went back in the garage, pushed the ignition on, and yes, the audio worked again.

When I have a chance, I'm going to look up just when I had the amp changed, so I can tell how long the audio was working correctly. No problems in a year, or more, and now again. Darn.

BTW, I think it was bad luck that this problem happened again, only after someone posts that he had the problem. I think the site owner should install a "No Audio Filter" on this site, so we all don't get jinxed.

OK, I went through my copies of the RO's and found that my amplifier was changed out exactly one year ago, on October 15th, 2009. Never had the problem happen again in that year. Used the car today, and all was well, even though I made quite a few stops (ignition off/on). If the problem happens only once every twelve months, I guess I can live with that, but if it starts to happen again, back to my dealer I go.

 

[mindhead1]

I got the 'no sound' problem today. I also got my first car payment bill in the mail today. Coincidence?

The unit seemed to be working except for the sound. I could change modes (Aux, XM, FM, etc.), use navigation, and bluetooth connected, but no audio.

The problem occurred as I was returning home from work. Everything worked fine this morning when I drove in. 8 hours later after being parked in a garage I had no sound when a started up my 2011 4.6.

I turned the car on and off a couple of times, but this did not resolve the problem. I called the dealer from my driveway and he told me to bring it in Monday and he would have a loaner car waiting for me. The problem didn't seem to surprise him. I have only 1300 miles on the car.

Reading this forum has also got me considering the extended warranty.

 

[mindhead1]

An Update on my previous post.

I went out at around 9pm after reading the forum and started up my 4.6 and sure enough, the audio was working.

Should I wait until it happens again or take it into the dealer on Monday and see if it is something they will take action on even if the symptoms are not present?

 

[firstov]

An Update on my previous post.

I went out at around 9pm after reading the forum and started up my 4.6 and sure enough, the audio was working.

Should I wait until it happens again or take it into the dealer on Monday and see if it is something they will take action on even if the symptoms are not present?

Take it to the dealer. The problem comes and goes and there is no way to have a mechanic to reproduce the problem. They will swap your amplifier (and reprogram your XM radio trial subscription, as new amplifier will have another XM ID, since it's located inside of the amplifier).

 

[PearlGen]

This happened to my car too just as we were traveling for a week in Myrtle Beach. No sound but could see the controls on the screen. Then occasionally a burst of radio, only to cut off quickly. Three days in to this we experienced the Stephen King moments with LOUD psychodelic electrical surround sound and no way to stop it. It screeched and pinged around the interior. Volume control didn't work. When this happened after the car had been turned off for a half hour, I pulled 3 fuses pertaining to audio. Screen went blank, and took it to dealer when back in town. I told them about this forum and the amp issues. They never heard of the strange noise problem. I picked up the car Thursday and they had "reset". Everything works EXCEPT my iPod won't initiallize. I have an appointment Monday morning for that. Dealership gives me a ride to and from work, which is only 3 miles from the dealer. The driver and I are getting VERY chummy since I've been in several times for service, replacement of back up camera, telescoping steering wheel sensor, and now this.

 

[PearlGen]

I took it in this morning and service rep immediately called the technician out to check the problem with me. Everything works except the iPod won't initialize. He tried a new cable, and then decided to order a head unit to replace. They apologized profusely that I had to come back in. My salesman came over to me, and asked if he could do anything for me. I told him I'd like to have a loaner when I return for the replacement. I hope this doesn't mess with my XM. I've been getting it free since it's July expiration date.

 

[mindhead1]

I got the 'no sound' problem today. I also got my first car payment bill in the mail today. Coincidence?

The unit seemed to be working except for the sound. I could change modes (Aux, XM, FM, etc.), use navigation, and bluetooth connected, but no audio.

The problem occurred as I was returning home from work. Everything worked fine this morning when I drove in. 8 hours later after being parked in a garage I had no sound when a started up my 2011 4.6.

I turned the car on and off a couple of times, but this did not resolve the problem. I called the dealer from my driveway and he told me to bring it in Monday and he would have a loaner car waiting for me. The problem didn't seem to surprise him. I have only 1300 miles on the car.

Reading this forum has also got me considering the extended warranty.

An update on my audio problem. I took the car in on Monday and the tech immediately told the service rep to check and see if they had a replacement amp in stock. They had the amp and replaced it, but ended up keeping the car overnight b/c they couldn't get the XM nav traffic to work with the new amp. After spending the next day working with XM techs, XM said they wanted to send them an amp with the latest software in it, believing this will fix the problem. I will being the car back to get the amp replaced again when the part arrives. As it stands now audio is working, but the XM nav traffic is not operational.

On a side note, while the dealer was working on my amp I got to drive a 3.8 for a couple of days and it proved to be enlightening. More so than when I did my test drive and was not familiar with either version of the car. I'll start by saying the v6 is a great vehicle and an ultimate bargain. That said, I am glad I got the v8. While the v6 is great on many levels there are a few subtle differences that give the v8 the edge.
- The steering feel on the v6 is good but I prefer the weightiness of the v8.
- The power delivery from the v8 is effortless. The v6 has good power, but you can hear the engine working to get you moving.
- The seats in the v8 are softer and more comfortable.

Had I never driven the v8 a would be perfectly satisfied with the v6, but since I have crossed that line I can't go back. If you can afford it, I recommend the v8.

 

[ctrcbob]

An update on my audio problem. I took the car in on Monday and the tech immediately told the service rep to check and see if they had a replacement amp in stock. They had the amp and replaced it, but ended up keeping the car overnight b/c they couldn't get the XM nav traffic to work with the new amp. After spending the next day working with XM techs, XM said they wanted to send them an amp with the latest software in it, believing this will fix the problem. I will being the car back to get the amp replaced again when the part arrives. As it stands now audio is working, but the XM nav traffic is not operational.

On a side note, while the dealer was working on my amp I got to drive a 3.8 for a couple of days and it proved to be enlightening. More so than when I did my test drive and was not familiar with either version of the car. I'll start by saying the v6 is a great vehicle and an ultimate bargain. That said, I am glad I got the v8. While the v6 is great on many levels there are a few subtle differences that give the v8 the edge.
- The steering feel on the v6 is good but I prefer the weightiness of the v8.
- The power delivery from the v8 is effortless. The v6 has good power, but you can hear the engine working to get you moving.
- The seats in the v8 are softer and more comfortable.

Had I never driven the v8 a would be perfectly satisfied with the v6, but since I have crossed that line I can't go back. If you can afford it, I recommend the v8.

Before you had your amp changed, I assume both your NavTraffic Icons and/or the Red/Yellow/Green (R/Y/G) Nav Traffic lines showed up on your screen.

If they did not show up on your screen before the amp change, they will not show up after the amp change.

If they did show up before the amp change, it could be that XM is not receiving the Nav Traffic information, and XM is not transmitting to your screen. It may come back once the information from local authorities goes to XM and XM sends it to your unit.

I learned this the embarrassing way last spring on my trip to WNYS. In Florida, the roads all had the R/Y/G NavTraffic lines, but once I got into Georgia, and right into NYS, the R/Y/G NavTraffic lines were spotty. Showed up in some areas, and not shown in other areas. Also, the Traffic Icons did not show up everywhere. I phoned XM about this "problem" thinking that it was a problem with my unit, but later, I realized that XM must get the information from the local authorities before they can put it in your unit. Even the Customer Service Reps and the Tech Reps at XM don't understand this, as they kept trying to get my unit to work. Had they just told me that it will only operate where XM gets the information from local authorities, I would not have been phoning them every day.

Lastly, the Traffic Icons and the R/Y/G NavTraffic lines are independent from each other. You can have none, or one and not the other, or both. If the work "Traffic" shows up in the upper left of your screen, it is receiving the information from local authorities and is more than likely that you not only get the icons but you "could" (but not must) get the R/Y/G NavTraffic lines when sent by local authorities.

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[mindhead1]

I am pretty sure the XM Traffic was working before I brought the car in for the amp swap. I could naviage to traffic warnings and also had the icon.

I can't say for sure I noticed the lines on the maps changing. I live in the Washington, DC area and there is traffic all over. I just assumed the XM traffic implementation was flawed when I did not seeing the different color lines on the map when I was on major roads. My Garmin Nuvi with traffic and Droid phones provide better traffic info that the XM.

This isn't that big of a deal for me. But since it is there I want it to work properly.

 

[chingador]

happened again today. Taking it in to the dealership on Monday.

 

[ikeym]

YEP I have the same thing head unit was replaced ? but ID same? Who knows !!! I GAVE UP ON SYSTEM SOMETIMES IT WORKS AND SOMETIMES IT DOES WHAT IT WANTS --- I JUST GO TO RADIO AND SEE WHAT HAPPENS WHEN I START UP AGAIN ..OTHER THAN NAV SYSTEM , I LIKE THE CAR & WON'T WAIST ANY MORE TIME ON IT..DEALER KNOWS NOTHING ABOUT IT OR WON'T TELL ME THAT IT'S CRAP THEY CAN'T FIX----SHOULD I TRY FOR A NEW AMP ???????
ANYBODY GOT ANY IDEAS FOR ME ????
THANKS
IKEYM

 

[Terry Wells]

I got into my car yesterday and found that I have no sound. Ten minutes later when I started the car up again the sound was back. This is the third time this has happened, they have replaced the amp twice and even replaced the radio. The last time it took several weeks to get the part so I am not sure if it is worth going thru this again. The sound always comes back within a few minutes, it is a lot more trouble to go back to the dealer and wait for the parts. I really do not think the Hyundai has a clue as to what the problem is. Any suggestions....

 

[mikec]

Hyundai doesn't design/build the audio systems... so they know little about them. Not an excuse for them to simply give up though - but it probably is why it's so hard for the dealership techs to diagnose: when they call the Hyundai central help line they're not getting the system designers - they aren't getting the experts. They need a separate phone number to contact the Lexicon engineers directly.

The stereo/nav system uses a slew of digital boxes communicating via a dedicated network link... basically a bunch of small computers. Such systems are subject to a common synchronization problem:

* box A sends a signal/data packet to box B. This digital info packet contains checksum data as well: checksums allow the recipient to verify the data did not get corrupted or altered during the transmission. Box A expects B to reply with a "I got it okay" or "I got a garbled mess" once B verifies the checksum.

* box B is asleep, hasn't fully powered up yet, is busy on something else, or box C sent a message at the same time as A (clobbering A's data) when A's message got sent... so B totally misses it. Or maybe B got the message and sent the "I got it okay" reply but that reply got lost/clobbered in transmission.

* Now B is sitting there, waiting for A's data... and A is sitting there waiting for B's "got it" or "didn't get it" reply. Both boxes are waiting for the other one... and thus neither will do anything more while they wait for the other guy. Not good.

If the programmers anticipate this, box A will wait only a certain amount of time before it decided "dang, B must have been asleep... let me send the data again." This is basically a time-out: if B takes too long to reply, box A "times out" and says "I've waited long enough, let's try this again." It seems the stereo/nav system software doesn't have "time out" logic... so when the head unit (A) and amplifier/XM tuner (B) get out of sync... they stay out of sync. A quick power-OFF & power-ON cycle may not reset the whole system because the boxes don't fully shut off immediately - at least on the Tech packages. They just go to a standby mode, ready for an immediate turn-back-on. Only once they really "shut off" will they reset.

My guess anyway. Lots of multi-computer systems exhibit this design flaw even though it's a well-known and old issue... no excuse for programmers to NOT know about this issue unless they've been living under rocks for the last few decades.

Another potential issue: multiple boxes trying to "talk" on the network bus at the same time, stomping on each other. Everybody has heard this in normal person-to-person conversation in a room, on phone calls, CB radio, etc. For electronic networks, there are multiple methods to "arbitrate" who gets to talk at any given time. One is how your PC uses Ethernet: wait until the Ethernet wire seems quiet and then try to talk... but listen at the same time. If your own message gets garbled, wait some random time and try again. Ideally your random time and the other computer's random time will be different. Otherwise everybody gets to wait again. Some networks use a "token" to decide who gets to transmit at any one time: this token passes from device to device, usually in a "ring" shaped network (Ethernet is NOT a ring net...). If you possess the token, you get to add your message to it and send your message. Otherwise you just send an empty token to the next guy in the ring. If one idiot though forgets to pass on the token... everybody else sits waiting for it. I don't know what protocol the Genesis multimedia bus uses... but I can envision a token setup based on what I've read in the HMA service guides. If box B is supposed to have the token... but B hiccups for some reason and thus forgets it has the token the network will get stuck. This is another well-known potential failure so there is no excuse for programmers to NOT anticipate & design for it. One of the electronic boxes/computers needs to be the boss and, if no network activity (including no token passing/forwarding) is going on, it has to know "create a new token."

Either way, the Genesis multimedia network seems (to me) to likely have some very basic design flaws... flaws that any experienced programmer/designer knows will occur and thus should have built-in programming to detect & correct. Rookie mistakes in other words. I could be way off base of course - there could be real hardware failures too... but the fact that so many folks experience problems with the Tech system, and that "when" is so random makes me think of software issues more than hardware. Either that, or the software requires the various electronic modules to respond at very specific times - any variation in timing confuses/locks up the system? Really poor design if that's the case. The Tech amplifier/XM module seems particularly suspect. And why does an expired XM subscription lead to voice recognition failure/system lockup? ==> another stupid software mistake.

My 2009 V8/Tech audio system has "gone stupid" a couple times now... with no apparent cause pattern: hot day, cold day, after a long time, after a short time. I can run the system in the garage for several hours straight and it works fine (using XM to listen to car races). Later that same day I can go for a short drive and XM might go stupid: the sound stops, the LCD channel & song info display goes blank, then it may or may not come back after a few seconds. Usually I loose the ability to tune channels with the rotary DIS knob - as if I didn't renew my XM subscription - except channel 0. Yet the XM presets work fine. Sometimes switching to AM/FM for a few seconds and then going back to XM fixes XM... sometimes it take 3 or 4 tries... sometimes I gotta park for 10 minutes. It happened once or twice early on; then it behaved perfectly for over a year... and just recently (when SoCal got cold?) it started acting stupid again.

Edit: sometimes the TPMS system starts up "stupid" as well, making it impossible to shift out of Park. That problem could easily be another software based network bug as well - multiple electronic boxes failing to communicate/synchronize to each other properly.

mike c.

 

[ikeym]

hi guys same thing ! my system does it all works sometimes ,locks up , no sound must turn off car and on again ..ipod locks wont do a thing, nav all wrong, black screen says starting pls wait for 30 mins. tells me to go wrong way much much more ---dealer made me wait for 5 weeks for new head unit and came back with same xm id number and still does not work...in retail so can't spend time with this crap anymore till after new year then I will walk away from car take my loss and buy bmw --no answer from service mgr. on any of my emails ...can't get service guy to come to phone ,they say very nicely he will call you back ! only once after 50 calls and on hold for ever----love the car but hate the service dept. any ideas ? I WILL TRY A NEW DEALER A FEW TIMES !!! but I have no faith in the system on the car...THIS IS FROM THE VERY FIRST DAY I GOT THE CAR IT'S 3 MONTHS OLD...oh yea bluetooth on blackberry sometimes they can't hear me & sometimes they can --so I don't say hello anymore just can you hear me !!!!!!

 

[bnajack]

Mike C- this is best post I've seen on this subject; it all makes sense. I got rid of my 2009 V8 Tech for this reason. Other than this problem (and cold start rattle) it was a fantastic car.

 

[kev4]

Everything worked great until XM Radio had a free week of airing. From that point on the voice command button mute the radio in all selections and does not respond to any commands. The only way to fix it for me is to turn the car off and then back on. This happen once before when XM radio offered a free two weeks. That sucks when your on the freeway and have to stop to reset the stinkin system. Anyone have the same problem and know the solution. 2009 Tech 3.8 17 spk Lexicon.

 

[Howard]

The last post indicated that the navigation screen shows a mute icon, which I have as well and can't get rid of. I'm wondering if everyone gets the mute icon or if they are just getting no sound? I guess I have the same problem if people have the volume mute icon on their screen.

 

[mikec]

The last post indicated that the navigation screen shows a mute icon, which I have as well and can't get rid of. I'm wondering if everyone gets the mute icon or if they are just getting no sound? I guess I have the same problem if people have the volume mute icon on their screen.

Are you talking about the icon that indicates the NAV system voice is disabled? It's a road with a crossed-out speaker icon. If so, to re-enable the voice: press the MAP GUIDE button on the DIS (console) panel, push the DIS knob down while the map is displayed to pop-up map options on the right side of the screen, go to the Options menu and then select Voice On or Off. That affects only the voice guidance from the nav system when you have a Destination defined... it doesn't affect the music side of the system. In fact, this option exists so that you can listen to music without the nav voice interrupting the music!

mike c.