New Television Pops While Watching It
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Post Fiend
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From: Sarnia, Ontario, CANADA!
New Television Pops While Watching It
I bought a new 42" LG LCD TV about a month ago. I hooked an optical cable from the output on the TV to my Kenwood receiver. If I don't have the receiver on and I use the TV speakers the sound works fine. If I watch a movie with the receiver then the sound works fine. But, if I watch TV and use the receiver for audio it will randomly POP and cut out for a split second. Also, when changing channels it will sometimes do it.
Anyone have any ideas? Maybe the is a setting somewhere?
-Matt
Anyone have any ideas? Maybe the is a setting somewhere?
-Matt
Hotshot
Joined: Apr 2004
Posts: 13,589
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From: NW burbs of chicago
Originally Posted by Beast12
I bought a new 42" LG LCD TV about a month ago. I hooked an optical cable from the output on the TV to my Kenwood receiver. If I don't have the receiver on and I use the TV speakers the sound works fine. If I watch a movie with the receiver then the sound works fine. But, if I watch TV and use the receiver for audio it will randomly POP and cut out for a split second. Also, when changing channels it will sometimes do it.
Anyone have any ideas? Maybe the is a setting somewhere?
-Matt
Anyone have any ideas? Maybe the is a setting somewhere?
-Matt
ditch the 42, get a 50
))))
Post Fiend
Joined: Apr 2004
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From: Lafayette, IN
I'd look at the manuals for both your TV and your receiver. There may be a setting on one or both as to what the digital audio I/O is, and they may not be set the same right now. I don't recall the particulars, but you'd be looking for a setting that has options like "PCM" and "Bitstream". I have the same problem sometimes with one HD station over cable, and at one point the problem was in a digital coax-to-optical converter I have (power supply was goofed up). Now, it's back, but it's only the one station, so I think it's in the audio signal they're putting out.
Jason
Jason
Fleet Mechanic
Joined: Apr 2004
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From: Willamette Valley, Oregon
Is it the actual TV that pops? I have one that did that once in a while, a 32" Toshiba CRT. It was static or something like that building up inside. Every so often, depending on the weather or something, it would emit a loud POP from "the back" somewhere. It never stopped working.. After a year or so of doing that, it has never done it again, its been like 7 years.. (Knocking wood loudly)
Moderator
Joined: Aug 2005
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From: MA
Gee! By the title I thought maybe they made a new TV that popped popcorn too..
Seriously though is the cable you are using new?
The cable may be picking up some noise and then it is getting amplified..
I would try another cable first..
You can also try using another input/output jack.. Most TV's have more than one..
Seriously though is the cable you are using new?
The cable may be picking up some noise and then it is getting amplified..
I would try another cable first..
You can also try using another input/output jack.. Most TV's have more than one..
Postmaster
Joined: Sep 2006
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From: Clearwater, Fl
Originally Posted by Beast12
I bought a new 42" LG LCD TV about a month ago. I hooked an optical cable from the output on the TV to my Kenwood receiver. If I don't have the receiver on and I use the TV speakers the sound works fine. If I watch a movie with the receiver then the sound works fine. But, if I watch TV and use the receiver for audio it will randomly POP and cut out for a split second. Also, when changing channels it will sometimes do it.
Anyone have any ideas? Maybe the is a setting somewhere?
-Matt
Anyone have any ideas? Maybe the is a setting somewhere?
-Matt
i would unhook everything, reconnect the cables and use cable ties for the loose stuff. it could be interference.....or something hooked up wrong.
if your receiver is capable and your lg has HDMI inputs i would use those. betwen my hd tv, hd cable box, hd dvd player, and my onkyo receiver uses HDMI, i run those cables only.
MSEE
Joined: Apr 2004
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From: Austin, TX
I'm going to side with freirefishing and suggest interference. Many times an audible pop like you describe is a result of an inrush of current. Any time a signal swings from a high voltage to a low voltage really quickly, it emits electromagnetic interference (EMI). The fast-switching on one signal can capacitively couple to a nearby signal, hence we say they "interfere" with one another. If you have cables for power and cables for audio\video running around back there, try to keep them separate.
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Postmaster
Joined: Jan 2005
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From: Peoria, IL
The audio dropouts when changing channels is normal. The dolby digital decoder takes a couple seconds to start decoding the new signal. The pops are most likely noise from other devices turning on or off. My reciever pops whenever my keg fridge kicks on or off because they are on the same AC circuit. Double check and make sure it isn't something like a fridge, air conditioner, etc tunring on and causing the pop (you might just notice it more when watching TV becuase you watch it longer then you do a movie or something else.
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Post Fiend
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From: Lafayette, IN
Some of you guys didn't carefully read his post. He's not getting interference from any cables--he's using an OPTICAL cable. Nothing in his house has the ability to cause interference with an optical cable. Now, something on the same power circuit could be the culprit as someone suggested...
Jason
Jason
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First, make sure all your electrical plugs are polarized correctly if they have polarity type plugs, i.e., one plug blade wider than the other. If you have access to a voltmeter, set the meter on ac voltage, touch one lead to the receiver, and the other to the tv. If there is not ac voltage present, everything is as it should be. If there is a high ac voltage present, something is not correct with the ac hook-ups, and danger exists with one of the units having the electrical grounds incorrect. If this is the case, and you connect the chassis together, you will have mucho fireworks. Most stereo receivers and tv's have transformer isolation in the power supplies except for some of the cheapo units. With transformer isolation, polarity doesn't matter.
Use a audio cable, connect it to an unused port on the receiver and tv. The purpose of this is to make both units have the same ground potential. It sometimes takes a separate wire going from chassis to chassis to provide this ground. Try this and see if you get any change. jd
Use a audio cable, connect it to an unused port on the receiver and tv. The purpose of this is to make both units have the same ground potential. It sometimes takes a separate wire going from chassis to chassis to provide this ground. Try this and see if you get any change. jd
Last edited by jimdandy; Jan 25, 2008 at 09:11 PM.
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Post Fiend
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From: Sarnia, Ontario, CANADA!
Originally Posted by jroehl
Some of you guys didn't carefully read his post. He's not getting interference from any cables--he's using an OPTICAL cable. Nothing in his house has the ability to cause interference with an optical cable. Now, something on the same power circuit could be the culprit as someone suggested...
Jason
Jason
The cable for my TV goes from the wall directly into the TV. It is the cable that came with it. I could maybe try an RCA cable from the TV to the receiver and see if it still does it. -Matt
Postmaster
Joined: Jul 2003
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From: Calgary, Canada
You're not the only one...
Hmm, it appears that may be a different problem, but came up when I searched for "LG tv popping"
Hmm, it appears that may be a different problem, but came up when I searched for "LG tv popping"
Last edited by furball69; Jan 26, 2008 at 12:06 PM.
Posting Guru
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From: Valley of the Sun AZ
OK, this may sound stupid, but my Mitsubishi did it also until I turned off the auto level audio. You know the one that makes all channel come in at the same level. It would cut out and pop if the sound exceeded the prescribed rate. It is worth a try.