ILoveC4 Posted January 31, 2010 Share Posted January 31, 2010 One of the TV's in the house that rarely gets used (by me anyways) has some interference that I'm sure is from power. This TV is on the kitchen counter and the component cable is fed to the back of the TV through smurf tube. The problem is there was really only one place to run this smurf tube, right up the middle of the stud bay. The problem is that 110 power runs up each stud on either side, and the cable comes through the wall directly between and outlet and a light switch. When looking at the COP ghosting is noticable. Is there some shielding or something I can put on or around this cable to fix that? Link to comment Share on other sites More sharing options...
henniae Posted January 31, 2010 Share Posted January 31, 2010 DanIt might be a ground loop. You might first try to isolate the ground for the TV (if it has a ground) by using one of the 3 prong ground adapter things.I once had a problem with a ground loop on a TV. I ended up running an extension cord down to the equipment rack and the hum bars went away. We ended up having to run a new circuit for power to that TV.The only way I can think of shielding the cable is to replace it with cable that is shielded. Link to comment Share on other sites More sharing options...
ILoveC4 Posted January 31, 2010 Author Share Posted January 31, 2010 DanIt might be a ground loop. You might first try to isolate the ground for the TV (if it has a ground) by using one of the 3 prong ground adapter things.I once had a problem with a ground loop on a TV. I ended up running an extension cord down to the equipment rack and the hum bars went away. We ended up having to run a new circuit for power to that TV.The only way I can think of shielding the cable is to replace it with cable that is shielded.Can you elaborate on how I might tell if it is a ground loop? Should I just run an extension cord to another outlet? I don't kjnow what a "3 prong adapter thing" is. The TV power cable does NOT have a ground. I should also mention (maybe this doesn't matter, I don't know) that the TV is plugged directly into a GFI. Link to comment Share on other sites More sharing options...
ILoveC4 Posted January 31, 2010 Author Share Posted January 31, 2010 This is just a little 22" sharp LCD with built in DVD player...nothing real fancy. Maybe it is time to upgrade the TV to one that has a ground. Link to comment Share on other sites More sharing options...
ichbinbose Posted January 31, 2010 Share Posted January 31, 2010 this might do the trickhttp://www.calrad.com/News.shtml Link to comment Share on other sites More sharing options...
tebery Posted January 31, 2010 Share Posted January 31, 2010 3 pronged adapter: Link to comment Share on other sites More sharing options...
henniae Posted January 31, 2010 Share Posted January 31, 2010 3 pronged adapter:This is exactly what I was referring to. Since his TV does not have a ground on the plug it won't help identify if there is a problem with a ground imbalance. Link to comment Share on other sites More sharing options...
ichbinbose Posted January 31, 2010 Share Posted January 31, 2010 You could also try a power filter from a company like furman to see if its an easily addressable EMI issue. http://furmansound.com/product.php?div=02&id=AC-215 Link to comment Share on other sites More sharing options...
avintegrator Posted February 1, 2010 Share Posted February 1, 2010 http://www.cablestogo.com/product.asp?cat_id=3110&sku=41147&cm_mmc=Google%20Base-_-Isloation%20Transformers-_-NA-_-41147If the power filtering doesn't work Link to comment Share on other sites More sharing options...
integratela Posted February 1, 2010 Share Posted February 1, 2010 We have had problems with older Sharp LCD's and video distribution. Tried every trick in the book to fix it, swapped the TV with a Samsung and the problem went away. Link to comment Share on other sites More sharing options...
ichbinbose Posted February 1, 2010 Share Posted February 1, 2010 http://www.cablestogo.com/product.asp?cat_id=3110&sku=41147&cm_mmc=Google%20Base-_-Isloation%20Transformers-_-NA-_-41147If the power filtering doesn't work If it does not work, well then return it. :cool: also if you look at my earlier post, i provided a link for a ground loop removing device from calrod. On a project that we were working on for a box store, all of the TV's execpt the pioneers had a simular issue. Turns out that the pioneer's had larger power supplys which helped to reject the rf & emi from everything else. We fixed the problem by using several power filtering devices and viola everything worked! Link to comment Share on other sites More sharing options...
ILoveC4 Posted February 1, 2010 Author Share Posted February 1, 2010 None of my other TV's have this problem, but they are all Pioneer Elite's.I'll take a picture of it tonight. It isn't lines or anything, just like a mirror image .5 inches to the right. Link to comment Share on other sites More sharing options...
ichbinbose Posted February 1, 2010 Share Posted February 1, 2010 A mirror image sounds more like an internal TV problem.when you see this problem, is it on both the component feed and when the internal DVD player is operating? If so have you tried to move the LCD to another room to verify that it happens else where? Another test would be to simply disconect the component feed from the TV and then view the internal DVD player to confirm whether or not it is the signal from the component feed, a possible electrical issue or that the TV is failing. If you still have the issue when playing the internal dvd without the component feed hooked up, then try it in another room. If the problem is there in the kitchen but not in another room then it may be an local electrical issue. If the issue persists in other rooms of the house then it may be the tv. Link to comment Share on other sites More sharing options...
ILoveC4 Posted February 1, 2010 Author Share Posted February 1, 2010 I'll do a little testing later on this week. The TV is about two years old, and I don't ever use the built in DVD player. I thought it would be handy when I bought it, but it has never been used. The strange thing is that it is only noticeable on the GUI, but that GUI powers other TV's as well and that is not noticeable on the other TV's.I'll do a little testing when I have some time this week and report back. Link to comment Share on other sites More sharing options...
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